Malicious PDF — malware analysis report

Static analysis result for SHA-256 35630e45bbb4f467…

MALICIOUS

PDF

82.5 KB Created: 2020-11-26 10:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ea0bc9e7c6dc333de565c41550f00309 SHA-1: d33169b3d9abf769b2a9009e98ea4797f6b6ae9a SHA-256: 35630e45bbb4f467db00e560fc28aa80e600ddde32b8ee7f40a8bda772dce034
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffset.ru/strik?utm_term=unblocked+games+66+strike+force+heroes+hacked PDF link annotation
    • https://wimejevufafej.weebly.com/uploads/1/3/4/3/134379448/kebebolufu.pdfIn PDF document text
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/33a79c5eb6d60.pdfIn PDF document text
    • https://rogefiraf.weebly.com/uploads/1/3/4/5/134581109/1655999.pdfIn PDF document text
    • https://xumolatakikekum.weebly.com/uploads/1/3/4/3/134335049/a13a7f194192.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://zutetovidum.weebly.com/uploads/1/3/4/4/134463402/7171831.pdfIn PDF document text
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/e2aa610.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca153f8-d0cc-4fa5-b5cc-fd825026cc31/romeo_and_juliet_crossword_puzzle_ac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64176b8b-c10b-4057-a0ac-950d5f8d4624/21147617180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c919198a-ff7e-48ca-9412-2d54d367086e/2802148002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e301b2f-fcea-4a62-b621-38a7547b3a8b/65617323044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15d6c43-6dbc-4408-9e57-59e6c9ded1b5/33113538939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc1b7c7-667d-4555-a83b-73ea8d006817/physics_for_engineers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe9d5d7-b3a6-4d54-8a32-eee5447985cc/68649126012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c11808-97ae-4358-ad58-71f6059bfaea/mysterious_shrine_pathfinder_kingmak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D6 15120 bytes
SHA-256: 7ebaa4c1d05e534a2d61a286ee3ae7ea0312cfad9f5812b20a85356f0b3eb15d
font_01_sfnt_off0001019c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019C 5784 bytes
SHA-256: 5743516f9506b41b1aa282dcaffe32ae4bec99ec029654f53e74a6629b3576e2
font_02_sfnt_off0001152b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152B 12296 bytes
SHA-256: b036df5a25c47baad2c1ffd435f45712373d21995bf97dfa6e2c6bd8563fa78e

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