Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fa71067d1fed2e…

MALICIOUS

PDF

75.4 KB Created: 2021-09-06 19:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1fecbce20964e9c129baa9c9413ccb0c SHA-1: a95c9738d00dc5a771846f0a454da96c5fe50a6b SHA-256: c6fa71067d1fed2e838bfdfac19a5265be156767a6415319a2618f3441023696
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness. The file's structure and embedded links indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://oniceh.ru/uplcv?utm_term=simple+compound+complex+sentence+worksheets+pdf PDF link annotation
    • http://tevukasveza.lt/ckfinder/userfiles/files/54897629648.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef586dec9e---raxip.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/abcc9b015ee0b65f5630dc2df4b8a1cd/tasojenivununezekuno.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/42175223185.pdfIn PDF document text
    • http://surestegc.org/documentos/file/zilesadinupazosejogek.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/65061054134.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/vovilig.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/kofaxerulofilubazipol.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/nuruvodazubefuzaxupa.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/15126893328.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/177f3ae08d99af41d3ccde40eb5025ee/fagonunelibe.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/ribazolodexitiwumix.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff28b8e672a---99618872107.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bbf5124d3---49591626849.pdfIn PDF document text
    • http://agama-rc.com/upload/files/57507878384.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2c024be5c3d57f96b8cd7f4cdf304cc9/76402302465.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/28784094126.pdfIn PDF document text
    • https://adikkedua.com/contents/files/lalemuwolubosoniwizana.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/97725244417.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/cfop10499kbtdd120o1gvpd8go/talorapoxujilarijiwasave.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/fc4gddeiltiakim20un57avr30/zatigizevomilemikugo.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/53354926589.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://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_off0000c298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC298 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAA 16680 bytes
SHA-256: 1a50bd0960f90e65b5476643e26dc2e60e7ab4e97049dadc1b67efc888903657
font_02_sfnt_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 11176 bytes
SHA-256: 68fca0d7be52cd12166af3b119f0523790df7567a64c1e0b75aab342505d25e7

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