Malicious PDF — malware analysis report

Static analysis result for SHA-256 97421fb30d5b0628…

MALICIOUS

PDF

46.9 KB Created: 2020-11-06 04:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a3a160d8407a6f243182ebd3c6740a9a SHA-1: 7b62b964a96c10a94559f895cac9223dd1bfaf1d SHA-256: 97421fb30d5b0628ab71931516b2a67660102c772d14aa9aee370ba28e15c384
96 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, suggesting an attempt to generate traffic or distribute malicious content. The embedded URL `https://trafffe.ru/123?keyword=selenium+chrome+driver+jar+file+download` is presented in a context that implies it is a resource for downloading software, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffe.ru/123?keyword=selenium+chrome+driver+jar+file+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5fa414b51831f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5f998e44a1872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/custom_1911_grips_bone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0caedc43-5329-4f13-bf9e-4af85b42beaa/95373658479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3fcedf-8f5a-4f9e-9541-6390915ff7e1/calories_dominos_pizza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ff8430-dbe7-4734-a95a-4b27bb6a7ec6/muzupenopaxiligijulalem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa531d6-36a1-42be-9f61-56cb6aa32304/64770501817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668f082a-3437-480c-869b-f0f39583deb5/rekisawalifuzabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e5defd-5f19-4461-b29a-1078ed7ecd9d/a4_size_paper_border_designs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7309/1769/files/rubiks_cube_instructions_3x3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f13ed7-4c57-41c8-9c50-5ab613813f45/12556059947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28e9173-cb7c-4187-b28e-b99e8ba8a564/intel_core_i5-4300u_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/area_perimeter_and_volume_of_shapes.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_off00007668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 5412 bytes
SHA-256: abe871d86685a39b821faf26b94ba55f918c460d944302d5ea4ce6a493f16840
font_01_sfnt_off000088bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BD 11692 bytes
SHA-256: d35aa0afa58f0855e4c8a0aa85612bf9ce385e4c6caeb3f97ddf91586360a44b

Open this report in the interactive analyzer, or submit your own file for analysis.