Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bf77d2c3f460e8…

MALICIOUS

PDF

80.9 KB Created: 2021-03-24 12:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 37423387f712b429894215363ee4db0c SHA-1: 5570cf93b31b6aac328ccbbac24429ba2a15b2c2 SHA-256: 60bf77d2c3f460e8884f4f1e33e7cd1667060712c263cf11122e5ed2db3dfb48
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://botokaw.ru/strik?utm_term=monster+vs+aliens+2009+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480880/normal_60433390ec974.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/xobavififematad-kotuzoko-kigaku-volezinujive.pdfIn PDF document text
    • https://xowavexinoj.weebly.com/uploads/1/3/1/4/131408618/9380573.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/DgiesIt/super_tux_racer_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/69gdjYU/superhero_fight_sword_battle_action_rpg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_604adcec0c7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5fd23a47cad29.pdfIn PDF document text
    • https://rixexumig.weebly.com/uploads/1/3/2/6/132681576/9cc43ebcc93713c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_5fdc738a41648.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/gPhchiJ/tajenirivun.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/mLhbTyR/xozisawopexisod.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/dhdNZgc/gefomukakimapudonovazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_667ad33e4688418185ea6e46f926270a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/phage_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/usfda_guidelines_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/niboturotanevi.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_51ec7d76029f40deba0224869a2cbbd9.pdf?index=trueIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_f58c474db3e0464581ae8e0d99cf30be.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_3eeb81e02fda4853aabf016758f99dfe.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_442401413a42433bb3e7a0f033ba5b81.pdf?index=trueIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_91f1a17a07e84da4acf028d182674fac.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_2af92cacffe0474cb5536f6d36cce72c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejados/bum_bum_by_yemi_alade.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 5408 bytes
SHA-256: 6654fd11c08d28a76fd0b7cf873b1a57edb41ed224021e632d86abfcdffd2ece
font_01_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 11368 bytes
SHA-256: f336be1ca98619357aa681507e335b5f623b73f814af1d703f250727d5d971fc