Malicious PDF — malware analysis report

Static analysis result for SHA-256 36468b9a60b697ec…

MALICIOUS

PDF

96.1 KB Created: 2021-08-12 22:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6047636a05d9ce5b5e3b07a4735f2fa0 SHA-1: aad0d0019a0b180da146ebfd3d98ea8c3fc00ff5 SHA-256: 36468b9a60b697ecc6e5707bd09c424db064b79af1c20a362fee0de2ed3cee45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crewmak.ru/uplcv?utm_term=vehicle+mileage+log+book+excel+template PDF link annotation
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9b22d3f5305a68d63f75b3d349517f9d/89720433647.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/powumetirobim.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/0ui28oajetqsaae89092e5cqit/17976644391.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/binabidofuduvuvuva.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/88501882893.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6ddeea04cf3cb4a39cf949d9c3d8c5b7/96355618681.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728adaae3b0---34774588905.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/5056402434a796554f4fc9eca1a98793/jefimigubote.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/8mlb5gdah10rci9u8kbjh82t8b/jesevamosufurovur.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/gigupavadevekivax.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/off53ecreldd6jfnrpfag649n7/83689308421.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b838b393037---69182050168.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf87fd4e3f1---gusozinijufixako.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/gikopuzoboxumobemaxodoli.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114e02ecd951---xivirugejage.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/27794820515.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/61391351930.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/29864694150.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/1ipv63pk9qtbv9un05bqvmh837/21422109700.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/aa77902dd402a40d411b9cd3ed2575d1/wevujibevaw.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606efea4c4fe6---98336232802.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b428f1be9eb---55650181584.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11352 17300 bytes
SHA-256: d78e0e7a34a2f9e6c343f83ae49d3b26e9a56776f1a552df089531aff2a70a36
font_01_sfnt_off000140a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A8 10752 bytes
SHA-256: f44482f544ae29fb4a4b5121e476861eb7e0199baeaf479709bb7fc36bc7d626
font_02_sfnt_off00015938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1