Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12ae51bf73b3793…

MALICIOUS

PDF

89.2 KB Created: 2021-07-01 09:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 082724702944c6c06b654e5fca5d4e7c SHA-1: 369a2ddec38915036f83fee310269da22d7af899 SHA-256: e12ae51bf73b37935a6693518c0ace3e4a2e549c4281cffd6de878eccaa589c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to potentially compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://wastran.ru/uplcv?utm_term=can+you+recover+photos+from+a+factory+reset+phone
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fbc5d20e0---860749156.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/3f254b2b0c0c3210946c8d8079276ee1/gupivadinomixejitavojokis.pdf
    • https://chp-travel.ir/data/file/rozolenagojaj.pdf
    • http://www.cerathai.com/image/upload/File/20783036980.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89c35f955---kuxari.pdf
    • http://bscartridge.com/pic/tomutojetilujotisowepesux.pdf
    • http://belst.by/upload/file/6052123811.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9648d72a0---zedojexarutatelotej.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ti2q0unob5eqnesc0k0gqvd8rr/xenezezajizizipor.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/194db885b9fe89713a4643ec9d9bee81/woboxirozuwopagubavumu.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/3b6e9500703ea0799b5bdc35d8dcfb36/mipawokusezoz.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/4c4b3dece58870f72df5ddee36fc1fc8/muzaboworukofejulemav.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a0ab1f8d8---73332940219.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f096b2b7c5---30242394081.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/9430f6effd1271a13acfd2006abdc8f1/50107810464.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/fce6ef97da4401083f6a5148f81540aa/35824141412.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071b76124249---gapup.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8a83d3de3---bezorizijadijibu.pdf
    • https://clifestyle.net/uploades/userfiles/file/71328755797.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/aa7283a6eff102fd0404bf49f6ff9b87/dajerixika.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/0875f625c50310ea95fe9ee7c0b0065e/jitabekepepido.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3knrlhmufs6tnh8cpf8j2fe46c/tumobepawu.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081db9e14f0b---pegowavoliwigemifirene.pdf
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/13074910532.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a30bbf301---bilopawejewarozofabik.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_off0000f47b.bin
6503b456d157aa0a2a22893dfb697fd6cb52d2b3150d407717acb00bfecdc0b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 10920 bytes
font_01_sfnt_off00010db1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 16792 bytes
font_02_sfnt_off000125c3.bin
74bd3cfc88aad984ed285bd406a64dcdf6eaf9c9bff98e917ebfbdfebf91a042
pdf-font-stream PDF embedded font (sfnt) at offset 0x125C3 19140 bytes