Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd321fcbbfb8095…

MALICIOUS

PDF

76.0 KB Created: 2021-02-07 23:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: cc5aabd8e7a895f3e24a1c0a4735818e SHA-1: 11c365db94d74cc3dde3ffc1fd724c7a65eff427 SHA-256: ccd321fcbbfb80951d5e32868fab114bf96d2f365d2979d5e399b86e36b6303f
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 embedded URLs, many of which point to disposable domains and are indicative of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a malicious attempt to direct users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classification point towards a phishing or malware distribution vector.

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://bologen.ru/123?utm_term=can+you+steal+in+college+softball PDF link annotation
    • http://particuliers-societegenerale.xyz/devotuzuh8tbo.pdfIn PDF document text
    • http://robolab.one/405888857218lh8l.pdfIn PDF document text
    • http://com-connexion.xyz/toni_morrison_beloved_summaryno4tl.pdfIn PDF document text
    • http://remontnatali.ru/intermediate_accounting_volume_3_robles_empleo8zkri.pdfIn PDF document text
    • http://mbfsopg.com/tirolwv7xm.pdfIn PDF document text
    • http://whitecheat.xyz/barley_grass_nutritional_informationczi3a.pdfIn PDF document text
    • http://geniusenglish.space/clothes_worksheet_free_printablecybus.pdfIn PDF document text
    • http://mavitrade.com/67260218418zha0y.pdfIn PDF document text
    • http://igrarazuma.info/northouse_p.g._2019._leadership_theory_and_practice._8th_edc8xy2.pdfIn PDF document text
    • http://copyright-services-us.com/jidekidegixijofabinalcvf7q.pdfIn PDF document text
    • http://zalavsky.ru/54943505168k94i3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5fd6d04ea38d5.pdfIn PDF document text
    • http://mercelus.xyz/test_marketing_definition_economicskhksm.pdfIn PDF document text
    • http://voztrans.ru/bupufhv4bo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5ffac6ba8fe9b.pdfIn PDF document text
    • http://deflecfcvy.best/thanksgiving_worksheets_for_5th_gradelwumn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_601aae5b86211.pdfIn PDF document text
    • http://studytogether.fun/27143244511svtm7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 5100 bytes
SHA-256: 2c0ddb460f2f49d4734e585ef3877dce878c276f65e49ee1bf28793a40cfda8c
font_01_sfnt_off0000fd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD69 11416 bytes
SHA-256: 42da03833377db98e9bfdce06027e8f96d703f09163279838f4af3df81a70d8c

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