Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cff73d50f82065…

MALICIOUS

PDF

74.3 KB Created: 2021-02-24 23:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 944c3a409c6cf4417f9cb5ae367cffd9 SHA-1: 0a6eb4fd7bf1efecaf66e1702ba1b983c90010c5 SHA-256: 09cff73d50f8206538013909c3bcd987d5ae5765f2d3597c4b32be11c78dd979
126 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 pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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 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
  • 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://leonvi.ru/award?keyword=how+to+deal+with+giving+up+a+cat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393761/normal_601653daa6cfb.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/8jcWkcb/food_giant_weekly_ad_columbus_ms.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/hcIQhjo/vabekopi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5ff758e0cf792.pdfIn PDF document text
    • http://givarixexav.iblogger.org/comprehensive_exam_questions_and_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_6002b95ce5d30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fc7da0ebb644.pdfIn PDF document text
    • http://gotedez.22web.org/gipirojivovusiw.pdfIn PDF document text
    • http://legalevi.22web.org/78189854265.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/gke0gih/share_photos_from_samsung_phone_to_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5fcf49cb698fe.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/6geTjfw/86929297638.pdfIn PDF document text
    • http://profyhouse.ru/82663802807wpgvl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davojuke.epizy.com/faa_airman_s_information_manual.pdfIn PDF document text
    • http://derajovaku.rf.gd/54631965365.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_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 5172 bytes
SHA-256: 709d1340184796feb419b5ae01386f577c3d78f2612fb054ffbf5273b5e97f5d
font_01_sfnt_off0000f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A6 10240 bytes
SHA-256: 1bc0add540b77794842c2f4d26b734b66873d0356f13da585c0fb83c9b65adc9

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