Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c7ee362a4d198c…

MALICIOUS

PDF

109.9 KB Created: 2021-06-12 11:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0a6616c20c2ecd8a986bda9065c9dbab SHA-1: 2c7c93819758960390d4026513f3975f74a74ec6 SHA-256: 36c7ee362a4d198c84db589a3b0d59ade694a117e96dc72f87069455d356210c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=dangal+subtitles+download PDF link annotation
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/894855965a8ea442ac5c3a543d61a84e/xumopitanofujokalukifa.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a63e6ed1098---12563924662.pdfIn PDF document text
    • http://www.celso.org/download/gaxuzuger.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf3d0ee5ae---fupedomobod.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/81461834882.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/da1cffd1d267977c49fc777a22c20c5a/76717614688.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/51055283721.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/70c8000d5c658781fe26e33fa31fb49f/93516612098.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a217355811---82523431135.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/mtbh5vek2arlpc6qburpgslau2/jivopapotusixasitunemito.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/xuxusixifazof.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e0lta0t8163m98ak233qfdpmcl/kibosajijelulitodepugu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c615ccf333---44262559237.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b4fa9af8a003bfcd7c632400a8b97927/10642646161.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd4fe3f8f1d78f11252e6a9ea7c1188a/54812106815.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/3c51f1110b717067ea0f130c3fce6ccf/venavogupebegurarotuwer.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c20e0ad1f1c49141696a1b56e9f68bb2/66437067717.pdfIn PDF document text
    • https://tl-systems.hu/files/files/xewadobotuwekutew.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/tufeja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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://scripts.sil.orgIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016cf0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16CF0 24224 bytes
SHA-256: d0c1e636d4b42eadf2c9cdba933640e308abeee19538b748db87b8367f85e9ee
font_00_sfnt_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 5228 bytes
SHA-256: 3527463610d76a516aac5cfef0338c0338eb2b56397df9268be9a78260b3668b
font_01_sfnt_off00010b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 5128 bytes
SHA-256: 26ce93b72986659ad7e3bf7ed51e72194a33d60ac6e70635ba7e7bee7a04f774
font_02_sfnt_off00011d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D28 9956 bytes
SHA-256: e1ef79eb41e296eadf7b3a1b94f7c8bdd7aaa15ba502955094b27025e0f11a46
font_03_sfnt_off00013c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C63 16880 bytes
SHA-256: 580c4a2db118a6ff5dc1a3b82b5dec790816a02bf0867dc5c0c6107c35af1602
font_05_sfnt_off000197b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B6 5372 bytes
SHA-256: c92b3c7c0e097f73df05da60be1b071f2aa2a069754073937f17b45d5e382b1b

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