Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec4c56d34bb1888…

MALICIOUS

PDF

94.2 KB Created: 2021-08-03 18:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 531ffc2edfa67792c9fac4a41c71e42d SHA-1: d542406e717e1ca18c47233c5cb63e6443ea5b31 SHA-256: cec4c56d34bb1888cdae5ff2f9e1bc4205418aa24c4f90d9a3a417313e11e3f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, indicating a likely attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting it may contain exploit code or further obfuscated links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://gaongonmaiphuong.vn/webroot/img/files/49593229658.pdf In PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c783ae95610---vagibibubofelu.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa8d7d6f60---15590393770.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f1f602b5fe1---26699058083.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/zafitunijisoxowed.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/40907633716.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/laselufozibutizulonotos.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/57669028546.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/80564190285.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8182f2c5e6---9365865988.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160842a56217a0---98026714994.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e3f59f8ae---saxokubetajifikipuf.pdfIn PDF document text
    • https://ive-cal.it/file/29985843559.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9b56a2602---gixisixasinaniwokezedo.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/rejabudawipesupalixitaw.pdfIn PDF document text
    • https://phr4u.com/files/27739580092.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/gojukuguletonobuxise.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/10936222399.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4bddb529---lulamokifagape.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/68187401991.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/xototukupu.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/kalisaxuliruliw.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/80576778011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+codominance+and+incomplete+dominancePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12367 10672 bytes
SHA-256: eaa2aa586eb9c7ed3cded76f491fb6f9a6168a81eb103888dabc7bcd9dad47de
font_02_sfnt_off00013bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAB 17292 bytes
SHA-256: 81532f9a763f0a66ebfb282d7d470a3495f6cd119c3b847567c0c11643244182

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