Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4930f0762d6f179…

MALICIOUS

PDF

105.0 KB Created: 2021-07-14 08:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 10afa3b113e6f0840fc22f637e72c3a3 SHA-1: 9f857a63b2e80ceb9d339a06c12830e6c604f18f SHA-256: c4930f0762d6f179341e77434718520703a1ee585feeb6e98e01c8c4750b23b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. While no scripts were directly extracted, the PDF structure and heuristic findings suggest an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://exosportsante.fr/ckfinder/userfiles/files/rumipebelazelexo.pdf In PDF document text
    • http://agrion.org/upload/fichier/60249923536.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/32507002651.pdfIn PDF document text
    • http://azizolace.cz/images/file/kosonotenifitetog.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rjmarr1i308o9a0grdq3ih23f2/zuxivijimavaneget.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/pofoxaboseravedatirobojem.pdfIn PDF document text
    • http://midel.me/userfiles/file/nivobudiduwusoziduzavozi.pdfIn PDF document text
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/73909705132.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/gerazusumowizilepa.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/wesuguzolok.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0e0e5da06572cf9eaffa599af7ade719/82617669844.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/27913684591.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/jh3p0omg9h7fbhak8fppn1fb6m/xikipedozikegugir.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/80c9f2824445c287987f3410ded1e7cf/jukomadevologuzul.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/wofusixefajoni.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/6c991e46957a3031d99f883c3cf7aa2b/xonulosamopozozi.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/kalanabinezisimeve.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/51acb90a1f52505cf1a468509e42edb3/luvumowilewexulokekenejun.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/70379994692.pdfIn PDF document text
    • https://robertbah.si/files/file/donigolewesofoligibasomig.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/40407434872.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/boxalu.pdfIn PDF document text
    • https://guijek.com/userfiles/file/ropasubadanujuresew.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/8b97e2e2f7c99749d05f1c9550fb20f8/80066280209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=a+common+function+of+a+dash+isPDF 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_off000138fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FB 17572 bytes
SHA-256: 8be37dddaf5dc3d38f98e9e5788b52d6a74c0d8f04698969d57acced3ec1b6cf
font_01_sfnt_off000166dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166DC 10544 bytes
SHA-256: 5777e8b1bf893a4b151b752dc37b2a0f0b02ab0189f4e69af1a731c80feac5d8
font_02_sfnt_off00017eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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