Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8373e0f4cbc065…

MALICIOUS

PDF

67.6 KB Created: 2021-01-05 04:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fc20904c1df3837cb4196c4350742549 SHA-1: 77b4082490adaa143ec4371325cb2956e0147cd0 SHA-256: 0b8373e0f4cbc065dd9fd58faf6976554f3ac606b05a3311619f640fc0d3397a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The CLAMAV_DETECTION and ML_NYX_PDF_MALICIOUS heuristics further indicate malicious intent. While no scripts were explicitly extracted, the nature of the PDF and its numerous external links strongly suggest it's designed to redirect users to potentially harmful sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7353

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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/aws?utm_term=3d+anatomy+free+software PDF link annotation
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/3588353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f91d5849b7af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fc809ae6075a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_5faa448248216.pdfIn PDF document text
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/53fee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f8c4aec8370d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fcf16c13d450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8fbd623dbc7.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/87cf0f6e314af26.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/dd99iac/save_the_girl_game_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447626/normal_5fd6fbba45d09.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755a1d5c-a1be-445e-99a9-c74f9f4df6af/english_flash_card_pokemon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995f38e3-8fe6-4ac7-b899-aebb2eb3f383/3798721563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aae180b-28c9-4480-9553-fbdeaa07ef28/best_torrent_sites_2020_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2281569d-aaee-4a49-aae9-ac38df29531b/phalanges_definition_anatomy.pdfIn PDF document text

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