Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fee9582afdf7a4…

MALICIOUS

PDF

70.5 KB Created: 2021-01-09 05:35:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d38a31c021365b501f53ebd33e5160b6 SHA-1: 05613f9889b8506b5088692a5d766afce56a8225 SHA-256: 79fee9582afdf7a445d6b499500a65c31aa75cd68147bf65383eae011f4301da
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a mass external PDF link farm, with 26 links detected. The embedded URLs likely serve to redirect users to malicious sites or download further payloads, aligning with phishing or SEO-based malicious distribution tactics.

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://traffine.ru/123?utm_term=ancestors+the+humankind+odyssey+wiki PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5faa54bc7961c.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/8zKDjgV/basketball_battle_apk_mod.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/e964894a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_5fdbe09899ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_5fe8eafa95d41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490961/normal_5fc8b3400b713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fd2c8a1d00e0.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/RWImJYr/88456518106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5fb44b3c2762d.pdfIn PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/kuxefemejedu_givigureniga_vopigob_fabexugagijupaz.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/gupezimagev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462976/normal_5fcb2dab6ca52.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/rurosaveruk/78254681902.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_off0000d557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD557 5396 bytes
SHA-256: 839f4d40a5615646c244098905d1373c452ab6b1aa9abd335fcefd177708fb29
font_01_sfnt_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 11112 bytes
SHA-256: cb0e010805ee9bb18f98bc0e043b6191b56bc1510e82d403f7866186b1869355

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