Malicious PDF — malware analysis report

Static analysis result for SHA-256 94107188a3e47c55…

MALICIOUS

PDF

111.8 KB Created: 2021-10-30 13:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 0ced7d9324d6bf0f916516ecffeea521 SHA-1: 06d20ce7075de4d3ac704e60756d0facb6aca114 SHA-256: 94107188a3e47c55c5ce5d30f9c3bb70f9e9f9f31b56b01dc388a3eaf320a4e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, distributing links across multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting. The embedded URLs are designed to redirect users, likely towards phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/64484711459.pdf In PDF document text
    • https://equator-maritime.com/userfiles/file/xekerepi.pdfIn PDF document text
    • https://mkart.it/uploads/file/8803160519.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/i6kc2u7982ff2k1kvdnk9d0904/37043294865.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/woriketexelexafem.pdfIn PDF document text
    • https://tmtteks.com/files/mabelanufixatifetezaxili.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109022214275971.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/3635467709.pdfIn PDF document text
    • http://congress.bpv.su/content/files/files/labuximisozorelolobom.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/42083049159.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/wutogetafowanazafokexu.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/walakotojamelekises.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/xusamozava.pdfIn PDF document text
    • https://naukriguru.com/php/uploads/file/borotiwezat.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/sisofazalejiwifatidukeji.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161510ed624502---wurukuruzojofitunupiregit.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/021244399070.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/xakurirazonopolin.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/60247994664.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/52149447247.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/vofezepoge.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/dufamiwiri.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/gilux.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/35om1isi9npehg9l92lqr1ob5m/29215180386.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/896FEnmJZlk/uplcv?utm_term=be+taken+with+a+grain+of+saltPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF0 10724 bytes
SHA-256: 26746eac08a9de1fecea5aa0a362305611f286d75e669dd222e217db23a1c317
font_01_sfnt_off0001689d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1689D 18768 bytes
SHA-256: e5fdc2d0fe73555ed4fd986095934127b4dc70151188d8c44f47e1643865c203
font_02_sfnt_off0001994d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1994D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1