Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f1468ce12396c1…

MALICIOUS

PDF

85.2 KB Created: 2021-06-27 09:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 773575632a6e3aed035397d5ea21e984 SHA-1: e410b912995f1d73afa71bbefe48816bf13e2a4c SHA-256: f7f1468ce12396c12da98c1bfc5e1f49a0959fda7641c5415570d73881ef0efd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ebooksweb.net/files/file/dizofuwetukajipukufitazi.pdf
    • http://irinaburmistrova.ru/files/24281748777.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f697855f0---bufokufisiruw.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b258b054f---godiwimotonevaru.pdf
    • https://melz-feu.ru/upload/25790284261.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606da23e23105---61627822863.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb6b8f39f4c0137a15f5be2dcf810aa3/67002949880.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e6dce2897---joneni.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/5ucr77sdjb9oaa2a6ggtn7ur1l/sesavege.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/262k8l6e4jmlekoktckgnvfe15/90761376231.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af6279da8c---47856892450.pdf
    • http://katachizu.com/img/news/files/xemewaxun.pdf
    • http://aep-tc.com/cache/fck_files/file/wusalin.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd29f2d8b---sunajokevapun.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/98a37fbcf2be2558f388550c4a63382f/13582953110.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f89849cd1f---jupebujevikidaxopuwo.pdf
    • https://havanic.com/cache/fck_files/file/19746652777.pdf
    • http://xn--80aikni6a0b.xn--p1ai/images/file/xiwipadota.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17e1bb68fe---92785759476.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/784e81073e2cd725cdc308dc253427b8/katakeputedolesaded.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c767d0ac35---54496497279.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160766f1f0eae2---pexigawipaji.pdf
    • http://cursosadistanciayonline.com/medios//files/38055165810.pdf
    • http://n-production.com/upload/fckeditor/file/56024829172.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=scan+to+pdf+app+for+windows+10
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaab.bin
c5b0107a746cc1075288e89f9d9c1e21437e544309754138cd39c5fa3bc6ea80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 16760 bytes
font_01_sfnt_off00011627.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11627 16792 bytes
font_02_sfnt_off00012e3e.bin
67a3f73bfbfb602821d2fa89bd5c0b90a18c9b4a4a66cff864a3e4351e97cdbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 10768 bytes

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