Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cad5a63ae81cfc…

MALICIOUS

PDF

92.5 KB Created: 2021-03-13 23:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b8c5f975c839e3a890ec02f8c20e5572 SHA-1: 50bf2582afce46a9462cbb900b05f7011f078ce0 SHA-256: b9cad5a63ae81cfc2fca2ea6d9a60a92215caa33c467e6f9b48305de6ba2de2b
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 hosting and are likely part of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially 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://nipisod.ru/award?keyword=balanced+scorecard+notes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451374/normal_6047e04a6e5f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5fe57f97301b0.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/2KYmkje/icc_cricket_world_cup_live_match_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/GjhzaOW/45735956265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481821/normal_60076943af7f9.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/80222214594.pdfIn PDF document text
    • http://fitit.space/sukurbyapv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_60451466246c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460057/normal_5fe42ebb868ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5fd8942fd64e6.pdfIn PDF document text
    • http://ilook.market/80553124170bno4w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_6016c71f23093.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/68503347422.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/lhgjcge/efootball_pes_2021_season_update_playstation_4.pdfIn PDF document text
    • http://retapobu.iblogger.org/regudapo.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/jjeUhfD/36778754865.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/43393432661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunerev.epizy.com/tepejog.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 5

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_off00012cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD3 5200 bytes
SHA-256: 2e519f9a1e005fa436126c300fd29bf95963936f50e29bb1051dc529428fde1f
font_01_sfnt_off00013e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8A 10968 bytes
SHA-256: 88c93af568de2588df64bebfb0f04d62fb76b2f39c8ef5069349a5899bccc67b

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