Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0409adddbad2b9d…

MALICIOUS

PDF

77.7 KB Created: 2021-06-04 22:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2b41c7430ef54fa62321645ee62cef6 SHA-1: 0d66e3da6cbd319112878a1dc753558396577297 SHA-256: c0409adddbad2b9d98768ef280faa3285022012f18ce5f49a8975683dd0ff841
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary function appears to be redirecting users to external malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pixomot.ru/uplcv?utm_term=que+fruta+se+recomienda+comer+en+la+noche
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/93b391r68t4fpns6f7gdgah3nb/xowowotopakepewujeku.pdf
    • http://boothbayharborshipyard.com/userfiles/file/nufurolirujuguwa.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e458380a80---xeronusujixiloxu.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1c9142550c6ad30bb755e3065438004/kimebepisurapifofovirazi.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/bee2961b0f156c4cde1b8df46f9d8c8c/rixilapo.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rdfv0862je5p4uqb6jtsfmipid/74582453196.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/8119hdlu1sso493p3fqgmmc39k/bilaninikate.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17ed494e2d---nidirijasite.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/5d1be8a41b7597e7134b422b6cbe335e/77686371253.pdf
    • https://dolmalatrek.com/userfiles/file/18665689486.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/3691158be350fff497ca3c586354906d/87856057413.pdf
    • http://monkey-do.net/userfiles/file/nonolifosobizepis.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a218f861722---jubita.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/8e3c3cb362deff2e6f6ec4e29a2c81da/60717236965.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071986595ab5---48243800151.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac092832513---14654985607.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5427010ef---70996353540.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb787a90f---43852754974.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef61.bin
fc1063239b4e0d2c9a1b541b77f9705aa284fb530a09eb5548cff8928b978256		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 5320 bytes
font_01_sfnt_off0001014d.bin
45affa1a59745662eeb8fe5469d2a0fb98243750cc49d48f119252a7c25c52b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 11980 bytes

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