Malicious PDF — malware analysis report

Static analysis result for SHA-256 7963fd7aeb4a8304…

MALICIOUS

PDF

58.9 KB Created: 2020-12-16 17:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 33090b2c6327dfafee30413f471d0907 SHA-1: cf7d927655ee8da30f932a6f5aee798a59099b99 SHA-256: 7963fd7aeb4a83047b328ade8548b3285e3c394cc1f8ff1a2fc90b2ca4aee65e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'traffnew.ru', suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to search terms, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=lyrics+bang+bang+nancy+sinatra PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497081/normal_5fc93e4de95cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fd9946bc7526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5fc86c6aee247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5fa31e67378a0.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/7667538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f932bea244b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3a0e816f6d44b07cfb956/t/5fcc35c5920f47545b85f0c2/1607218629973/child_care_licensing_jobs_colorado.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c964f98375720d699ac/1606372505890/solar_seal_900_where_to_buy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1cc82f7cf8c7540314308/t/5fc4ee973f75b166436e7b4b/1606741657627/rijezemunenazejop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2fd6b97992eb55c026f/t/5fc14cbae18c5c478e2c3572/1606503611306/fakas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c05eb8467722f1ec93c2/t/5fc6718a64571256541a0b8e/1606840716250/carpentry_school_london_ontario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb73facc-f9f9-412d-ba85-561f17826808/1084819936.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfbe479c08c7f2b9ee89c/1606220773439/oconee_county_jail_inmate_search.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c395147b14804297218/1606372410160/ground_elk_recipes_pasta.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_off0000ae3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3D 5116 bytes
SHA-256: d6c1d9b2139fcf6db260de3f5d694b8e2aa0833ed9f6a97777f14b910fcbf441
font_01_sfnt_off0000bfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC4 9092 bytes
SHA-256: 2d4ee48b288247985d748e0fee68b6a83f8a2b6e421b143da276a3acd53a7575

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