Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11179aa5aa658b2…

MALICIOUS

PDF

96.2 KB Created: 2021-06-27 23:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3673be8734e891b6d66babea6562e2c SHA-1: bef53719801c25e225b504431d29cd946434f8a4 SHA-256: d11179aa5aa658b285eb3a7e8740c107992228185c230927da66ee878610d300
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=terraria+brewing+station
    • http://cohensevents.com/clients/74638/File/zelagas.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a6655a9380df9681dea4aaba8e26359f/roxujuxukugaforumuposip.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/7e3593a390011a5f8d611c80abb8f597/besukelorig.pdf
    • https://autotrans911.com/thread/admin/uploads/file/puzojavogerorejakenuruki.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3dc20bd984b896ae9724badafed5fac9/fivigebupo.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608718c3db178---51325857436.pdf
    • http://henri-ruch.ch/doc_pub/file/10495687280.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2a78be3d8d94611f947ed6d9d2c168bf/zobalinasobimom.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3cfe70b6a---woranutudix.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/45a6c953120b199b8a5025090dfff1fd/dabewerojutunatinize.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/k161odmbklcemit0q1t6tnce97/dakubeduvijonam.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/65edb1de932a3c3d9b31aac0d92d31f7/sufofaxevuweze.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c243524a1f6---74094318902.pdf
    • http://banghetretunhien.com/media/ftp/file/zomawemonoli.pdf
    • http://onishi-kyosendo.jp/archive/21848379318.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/48b8d2c55860924b90477c8d89ac218e/bopurigixabufeditamed.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed66ce7dd6---nakunabisixo.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7c9d4088b---49427512760.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d222c0d6bc2bf3e0ba70762492c09c18/vuxabesosi.pdf
    • http://apexnepaltravel.com/userfiles/file/83137395667.pdf
    • https://itandem.net/ckfinder/userfiles/files/95068140413.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/f995hk8qp40pjjij31g26mtrrd/depalevisuvogujajulasegam.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/38e6a519efbbdad5d649e62307addba5/gukujaje.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0fb69e794---xelitapefewufiwumexe.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709cfe34932---wikakabevirosidusesog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011388.bin
fda711b3e4ab32b1095027eb49f7d8af1571c8c39e0277f0abbbe823bed48869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 10428 bytes
font_01_sfnt_off00012b66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B66 16792 bytes
font_02_sfnt_off00014378.bin
43ade5f48c9c0533c90be421b579550104900e8770e7695ef171a1151911814e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14378 18872 bytes

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