Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f179252c1c0e7b4…

MALICIOUS

PDF

139.9 KB Created: 2021-06-12 19:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5d895fdffc64945b1b0c3393a3606127 SHA-1: ce059fcffb56cd58d23453a62700162fb60ec4ad SHA-256: 3f179252c1c0e7b405bee36278dd94fa88012eb966961d564567bbb0a91db7ea
206 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or malicious content distribution scheme, indicated by the presence of a large number of external links, many pointing to disposable hosting. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this is not a legitimate document. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure to download further payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://pistant.ru/pbw?utm_term=the+handmaiden+english+sub+full+movie PDF link annotation
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/vabujexiwuzere_gapezudal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_60427b146bf1b.pdfIn PDF document text
    • https://sojuseruk.weebly.com/uploads/1/3/4/3/134367588/ddb0f09ebbe6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_606e8a611f15d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_603c3f93dde5f.pdfIn PDF document text
    • https://wegogitizunivom.weebly.com/uploads/1/3/4/3/134369171/2944644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_60671069b17dd.pdfIn PDF document text
    • https://gulukuse.weebly.com/uploads/1/3/2/7/132740430/4866951.pdfIn PDF document text
    • https://polopiwej.weebly.com/uploads/1/3/4/3/134353222/1708472.pdfIn PDF document text
    • https://kasexesupa.weebly.com/uploads/1/3/1/4/131437862/bamobizi-lexezazajeg-potogekimaruj.pdfIn PDF document text
    • https://belifexemanugo.weebly.com/uploads/1/3/6/0/136051541/dalaletesiduruwub.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/jadisaxuzabu_lanujigoxikun.pdfIn PDF document text
    • https://nusupubibirimu.weebly.com/uploads/1/3/1/8/131871553/24756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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.indictrans.orgIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b77a6a-5c17-4870-8ba4-89be9104626e/trigonometry_test_grade_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb33c9cf-5d92-44aa-aa27-fba74583c36b/kagusodipukurus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9992c6-03ae-4b39-b5c9-af87b351fdae/novela_os_dez_mandamentos_capitulo_78_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831df1f5-422e-4f20-ae16-f692fc11b117/que_es_agente_autorretenedor_en_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2516f462-2b0b-4721-82e0-e58ad98c0ce9/can_you_use_evening_primrose_oil_capsules_on_your_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc67460-146a-4488-8755-2f3a799393e6/sex_and_the_city_complete_series_dvd_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b22c059-4369-4145-b483-afbb1f109f75/self_attested_manifesto_for_domicile_certificate_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2f7964-1ab4-4483-b089-14891ede13e1/lomibenarefub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a71b74-e914-4286-8a79-544a3ed735f7/55708257934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4014836d-41c1-465b-a26f-81e1e6a5bfcc/telugu_moral_stories_to_write_with_pictures.pdfIn 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
    • 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
    • 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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn 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/gpl.htmlIn PDF document text

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off0001ecb4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1ECB4 18892 bytes
SHA-256: 325885a5cc232997f9265752ff893518e3588b49fec3e6934508a2ba2299ec55
font_00_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 7916 bytes
SHA-256: 4fca73d47fa94a6ad668c0f4434483fdc2f54e6be5ae77a011c3735f5dfefd3b
font_01_sfnt_off00011ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 7192 bytes
SHA-256: b3c1c7902207a56fab7d8806aec1319820a2fc4766f7d2abe11a6a0c9cfd22e2
font_02_sfnt_off0001352f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352F 5376 bytes
SHA-256: 3987330c8e55182eb396bcf5ca835cf89556a927e678152e2e9ee0b0766c5d72
font_03_sfnt_off00014757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14757 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_04_sfnt_off00015259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15259 4140 bytes
SHA-256: 7073f777ec002e82a856420936458262fa3cc3b4ee0437ed56f01fa51c4379d2
font_05_sfnt_off00015f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F77 3048 bytes
SHA-256: 2f58f42410b60611991c12283e964e03297a95500ca09b14f4d605296bc50bc4
font_06_sfnt_off00016b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B87 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_07_sfnt_off00017644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17644 2604 bytes
SHA-256: 0e4b190990c22158f359a0de2485c61736e93a484cfb226f63bccb9bc1da1b2f
font_08_sfnt_off00018126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18126 3840 bytes
SHA-256: 5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872
font_09_sfnt_off00018f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F3E 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_10_sfnt_off0001991c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1991C 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_11_sfnt_off0001a6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6BC 6148 bytes
SHA-256: 149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
font_12_sfnt_off0001b6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6A5 18416 bytes
SHA-256: 26ff68dd7514c0732a08f0f94bdc95b129ed8a823f6b6db3d2d7f052135e6d40
font_14_sfnt_off00020c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C11 3536 bytes
SHA-256: 7260850907c932567cbfd34933d3cabda316f162d2897651222b22ae0a4cbd12

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