Malicious PDF — malware analysis report

Static analysis result for SHA-256 41853960be68597d…

MALICIOUS

PDF

76.5 KB Created: 2021-03-11 07:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3cc93c5135d9010fa83a7412f5cd684a SHA-1: 4912eff25508d9e910974b17566a41fc51d5bc3b SHA-256: 41853960be68597d97907ad51a014145dd242f0e18e54eb33aed1c4db36de123
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 pointing to disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://golowaki.ru/123?utm_term=armattan+rooster+manual PDF link annotation
    • https://s3.amazonaws.com/zaxuledo/41692753994.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/movie_maker_online_free_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/E8hdWP9/jodiv.pdfIn PDF document text
    • https://legufita.weebly.com/uploads/1/3/4/8/134866723/wogev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_601411dfb27dd.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/uibvZBb/wells_fargo_mobile_app_login.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/6397085053.pdfIn PDF document text
    • http://danoguvu.medianewsonline.com/61870756227.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/35137699404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_601d7ab88e587.pdfIn PDF document text
    • http://kidulukapaxarej.iblogger.org/baca_novel_ceros_dan_batozar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491148/normal_6004bef908002.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/Gdgchd0/pivavupaxoxora.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/bts_album_answer_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/DgdPlB1/woxebewarenadonobubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_602088661aa22.pdfIn PDF document text
    • https://wilosobofixi.weebly.com/uploads/1/3/4/8/134858013/panajeji_zerezo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/84543512141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jekopadifixuniz.epizy.com/how_to_start_preparing_for_usmle_step_1.pdfIn PDF document text
    • http://jolijugidepim.rf.gd/81230981723.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 4820 bytes
SHA-256: 2203d88f74ec37a96c0e283c152d467b75e50600da2ec3d003054fc699ff62ff
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 10348 bytes
SHA-256: d8424aafd856d8bfd8192ebf43c38f790a0ce4f78bcbf03cec876aa99f5c9791

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