Malicious PDF — malware analysis report

Static analysis result for SHA-256 104ee2872a330abe…

MALICIOUS

PDF

38.0 KB Created: 2021-03-11 03:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 833f3e86ada741c8e0daf3d92900c20c SHA-1: 1d7185adefa2bfbb9ca86f7063c93272b455203c SHA-256: 104ee2872a330abef1930df5a401bd3808a794c09f1d9b8fef1c4e0bdf094af6
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious due to its structure, which resembles a screenshot lure designed to trick users into clicking a link. The embedded URL https://yafferge.ru/award?keyword=codices+mexicanos+pdf is flagged as a known malicious redirector. The ClamAV detection and ML classifier further support the malicious classification, indicating it likely serves as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7100

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/award?keyword=codices+mexicanos+pdf In PDF document text
    • http://fomilexavekol.22web.org/bapibokomova.pdfIn PDF document text
    • https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/8053504.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_4363e0c377794967ab0941bca02f2498.pdf?index=trueIn PDF document text
    • http://tifofev.rf.gd/67946081592.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/89815821972.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/mexep.pdfIn PDF document text
    • http://kasisexa.rf.gd/kaka_bhaniawala_songs.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_c74ee11fe64e497cb4ca856aedf0b477.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/what_is_the_purpose_of_essay_analysis.pdfIn PDF document text
    • http://nulanajivokavos.rf.gd/46913866571.pdfIn PDF document text

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