Malicious PDF — malware analysis report

Static analysis result for SHA-256 716851733ce16033…

MALICIOUS

PDF

69.5 KB Created: 2021-03-04 06:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bb43a04bf7a99f08ee6da1b4cfd220e9 SHA-1: 6ad53a79f4c327dc60cd6bd458d772d6a62ef33d SHA-256: 716851733ce160330c42a4d4c08c6fe8de2b24e696135489c31f019b37e7351e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting services, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8212

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.
  • 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.
  • 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://vilenefex.ru/award?keyword=google+search+dark+mode PDF link annotation
    • https://cdn.sqhk.co/rubuxupab/ZgfPgdi/lusirik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_600d7f1ae766e.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/iiiiibL/92471641876.pdfIn PDF document text
    • http://pornbustyvids.com/navodavowevo7g.pdfIn PDF document text
    • https://nikovazof.weebly.com/uploads/1/3/2/6/132682709/7867157.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5feccd6fdebff.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/ejjcJia/like_father_like_son_movie_1987_cast.pdfIn PDF document text
    • http://rabota-plus.club/after_you_jojo_moyes_download6zb12.pdfIn PDF document text
    • https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/967119d7b8.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/8e49f4cc7da195.pdfIn PDF document text
    • http://leopards.space/47989570514zbeub.pdfIn PDF document text
    • http://xenuven.22web.org/how_to_check_for_identity_theft_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/jghRHih/nixotagajidiloxalele.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/jjgjidZ/3505034692.pdfIn PDF document text
    • http://juxeribitu.iblogger.org/dance_video_hip_hop_hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvubojetixag.epizy.com/66666143593.pdfIn PDF document text
    • http://tejojode.rf.gd/jingle_bells_original_lyrics.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/31194422990.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_off0000f205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF205 5448 bytes
SHA-256: 54dd168616ded824c275aae368d4d2894756e862678b59f3247d37b73143fe2a

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