Malicious PDF — malware analysis report

Static analysis result for SHA-256 884098d6e3061815…

MALICIOUS

PDF

76.1 KB Created: 2021-01-04 02:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7516c34e54eab2565c96b4fd258440be SHA-1: 741f2385d929e2a1cf38f662d431492e8602487d SHA-256: 884098d6e306181560cd183eab4e656ad28d191d9b8ce6af417e8b79aff31fd8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The presence of an external URI pointing to 'trafficel.ru' suggests a potential phishing or malicious content distribution vector. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=paul+prudhomme+gumbo+chicken+and+sausage PDF link annotation
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/a53d2b3c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_5fd3326d98f81.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/7ee91fb6-c5bd-47bd-875a-217fcb9a0b84/uk_vs_auburn_basketball_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/jotadudozajev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeea4ea3-8601-411c-be50-839e35cc57ef/2964265368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6e6b48-2e65-44c5-bf6b-806f1fb9b89d/screen_timeout_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/urdu_calendar_2018_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002281ef-5c55-487e-af69-abc2769773e1/learn_to_walk_before_you_run_meaning_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86317b0-9da9-43d2-bbbb-12ff7a955538/75898399805.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/giwaduvidapab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d58f47-11a5-420a-af81-d8ed6985b5f7/f2p_99_crafting_guide.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_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 5692 bytes
SHA-256: ca01733c9aa82fad6bf70ae8899d6ee9139af87fb386a9a9f830f1d9dd23b7ac
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 10780 bytes
SHA-256: ac78c2a9cef935a79c6ca9d214fdb7021b6e87762df3a611a692a2d099b4770f

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