Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15bd1e89bc0bfcb…

MALICIOUS

PDF

49.6 KB Created: 2021-01-04 20:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c1a8b04ace6e0ff97b6ce10aef78ee19 SHA-1: f03c1eddc215a45f6b1b8680453af30b2faeaa90 SHA-256: c15bd1e89bc0bfcb1e32327ab59f2427f1da1d42383bd93d2125559c1f9d26d7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The presence of embedded URLs further supports this, suggesting an attempt to direct users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8708

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://traffset.ru/aws?utm_term=breast+cancer+in+marathi+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471096/normal_5fad9c6904438.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/5598196.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/Egdheij/dolos.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/0Uuo1wv/zikuxisix.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/id3hdg4/multi_puck_hockey_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5fa7d47fc1eb7.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/jbkidmO/salatid.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/ggLGvgd/liverpool_wallpaper_hd_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/diwomijo/Ur07dDo/fegaxabobibevunixefuli.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/y0jiZNs/find_my_family_friends_phone_app_review.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/e39c972d-5379-45f4-94ed-8eab368d9374/sonutobutuxifukomoruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d652d527-5348-48fd-8075-b6142b91cc35/jogogokixeludofela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce658b0d-fa5d-457d-886e-e4f0f8c220c7/how_to_lock_someone_in_a_discord_channel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080427e0-3c03-42f6-ad28-fbc76bd4949b/precalculus_vectors_worksheet.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63D 5136 bytes
SHA-256: 0144958db808742dfdcf2780e291639882b05c0bfdee58f117a4aa62c318c59b

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