Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d6381ffb896e88…

MALICIOUS

PDF

169.0 KB Created: 2021-06-19 02:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 006d1eb61e8da1eaed0b5babd3687674 SHA-1: 2be6a569dd904455d2d98ee2a7699ee51335b153 SHA-256: c3d6381ffb896e880e7bde4fba310d1f8ccb0a06e37ac66e95959a8db51684b4
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of multiple external URIs and links to potentially compromised sites indicates an attempt to lead the user to a malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8964

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://inwebjor.ru/uplcv?utm_term=d%2526d+5e+dragonborn+sorcerer PDF link annotation
    • http://granite1962.com/clients/869125/File/64758228938.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/pisajakixakudowosorebop.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jugewofapemoguto.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/565971ca4e1215e9182fd0f7ab8e01ac/wifaluvibenelewufapa.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6665b250f---kinujo.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/69969917861.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/44558077040.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d52580ce---32074289983.pdfIn PDF document text
    • http://mega.kz/media/upload/files/31244358215.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/kbn6fbsg85ltq7irha5eaf9d22/wisarawopinere.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/paduzozuwunajetadewixomi.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/lrdepqcvpcbr5n3no5vv41ulg4/92236776621.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/85876868819.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7cb5e680a2191b27342bafc968b88ef0/zatusugomixejesoju.pdfIn PDF document text
    • http://coumert.com/images/file/91637562780.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/lelexaso.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eaa7d14ce---tatejoxez.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e98aaabe8---vafogimosepipo.pdfPDF link annotation
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0ba319129898e69b0b2efa777bb85cfa/88803792932.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://scripts.sil.orgIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 18

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0001f1e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F1E5 19380 bytes
SHA-256: 0848011c5bc734ee643db138d530f95bec50730ff15d4ad7ce2dc2994fec1047
font_00_sfnt_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_01_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 3612 bytes
SHA-256: a3092163937b5c2949d1986ae69da3692f5096c98e1e1b86342fcf3090b92528
font_02_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 18952 bytes
SHA-256: 83e86e1b9f4a933a99eafaf4ac44543770a090311534d9e4ac6eabe207e81af2
font_03_sfnt_off00013fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC1 3484 bytes
SHA-256: 10b1e8ca5c1ffd40509c37c8d23269801adcfe34a1607cb54df6c3846a3e687a
font_04_sfnt_off00014b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2D 2604 bytes
SHA-256: 5fd53e2058c4f5d98b70161d670f1e42036942552fef68ac845a5e47e2d7f715
font_05_sfnt_off00015645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15645 3048 bytes
SHA-256: b5c6b6e0c9ada0bf1c6b02372d38a6194b0fc304f51b15768a03b7bd417def48
font_06_sfnt_off00016252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16252 2656 bytes
SHA-256: ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c
font_07_sfnt_off00016d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D2F 47624 bytes
SHA-256: 98f616fae5e1bb9d8ae005e6b4fe81ae83f046cb525d1227f361f417600e392b
font_09_sfnt_off00021319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21319 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_10_sfnt_off0002211e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2211E 4140 bytes
SHA-256: 2a2f73c0ee504ae8509221dab9a50e72e6c400a18e3952d3eee660ba18a0c3b1
font_11_sfnt_off00022e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E0E 3840 bytes
SHA-256: 5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872
font_12_sfnt_off00023c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23C26 2108 bytes
SHA-256: 5fc9e2cd4e7ad04544edda2023dd698132b65daf167a61e09de9fd8de66d8b52
font_13_sfnt_off000245fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245FE 4544 bytes
SHA-256: ff18c81e36cb9b15efdbce47b580caf324ee17e344593362339bc7644b00bcc1
font_14_sfnt_off0002540e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2540E 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_15_sfnt_off000261b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x261B8 4216 bytes
SHA-256: 5cc8f364962355ae475115db944fd7a4d20f38d86c7f7c448382747ab212ad85
font_16_sfnt_off00026f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F74 7916 bytes
SHA-256: 2e595141cfc5a730015d867094056734cd151f5b215480bba884d522f17c5808
font_17_sfnt_off00028409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28409 2328 bytes
SHA-256: 18b250f24057ce91e4a59b25c1eec79fa8b4d7e2cb9f6c0de02c7e032a072fd4