Malicious PDF — malware analysis report

Static analysis result for SHA-256 9654faa9fc504192…

MALICIOUS

PDF

112.0 KB Created: 2021-07-13 15:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2bab7ff10dd545e357d3a24b84cf2aa7 SHA-1: a0a760845fb5c75501d4ee533272747f07591e26 SHA-256: 9654faa9fc5041921df06587b7ddb15b7b6bb281a5ecb1a4e847c0034ee83549
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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://pistant.ru/uplcv?utm_term=airports+on+water+reading+answers
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/506eef0e59d5ac3b13351abf6fcebf33/54958073009.pdf
    • http://podlahyadvere.sk/editor_uploads/system/files/2138762518.pdf
    • http://kingcraftviet.com/uploads/ckfinder/files/90444180283.pdf
    • http://thy-environment.com/userfiles/files/46191986492.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/pt4ehguo1tuk5p4uos4br5l6rg/fepozijufitaz.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/768eed1031b1b21761a19bcbb7c08491/13598743028.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f35cc37ced3b4d80a7ae0eacd83cdd9e/44523306365.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729d54c6073---gotezagukozagajivurifer.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b468a8f64b---madaxobatera.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/e9467mk1f3ikr2hhb1kk76tcpn/nomezowolojobugabojef.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb20bc60a76---xatidanopasuv.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0f68f738cf53a4ca90789909c90d9723/zupidesofedun.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160793d8cd893b---80757657943.pdf
    • https://kindeeyudee.com/ck_files/files/16902305995.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6c8325480---91971021457.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/cd184214a70e3fa904c8c4ea0fffe132/patitenajivoludabepa.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bc62d09177b---viveko.pdf
    • https://planet-for-events.de/userfiles/file/danedijifubizuje.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/84482d2ca4a25bd19e0afcc6a64cd070/tasusigisalumamuwoz.pdf
    • http://secretlove.ch/ckfinder/userfiles/files/97046928382.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/0e3fd1576344f08ca0c02c5beec5ec49/moperuvokerazefes.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160966124442ca---60602195026.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798fb3e9c3d---79616648035.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b76b779f4---67073240653.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a2afc61e9---zurizerawusa.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/38a695d5499b741da609916c1be19a82/visujafefagojib.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b8884cb56fc115d5263ede13855d1c99/ribotilosupuropisola.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014aeb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEB 16792 bytes
font_01_sfnt_off00016302.bin
32623f99a9b238f965803e1827fd42e81752dedfabcaf91ee89034d3deafa0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16302 10588 bytes
font_02_sfnt_off00017b2a.bin
c42c2288e79583df7df310594f0b97f65b8455189d27516a1a9dc983ad0d6ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B2A 18520 bytes
font_03_sfnt_off0001aa75.bin
bb9731fd5492edc662998cf978ac3b290e8571b9cd17069030c055773f711587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA75 1916 bytes

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