Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e94d7d12d1c2981…

MALICIOUS

PDF

73.3 KB Created: 2021-06-09 17:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726562ad5133190b763f124488406628 SHA-1: 3cddbb806fa09aca68129a97139c7f8b392aeeeb SHA-256: 4e94d7d12d1c298138e2b29f75952ac072804864a31071fef233b773a547fbea
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=horus+heresy+inferno+pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc18b220112---73971221034.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/fnt661ed7t4idcg385fk9hpa2m/faxumin.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3d986fb64---68537158541.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/875d0d2d10969299a5d2c65445ecd5f6/92780758609.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9ef51643f---fezovuvatazimekamege.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/vjo691lou7n22b60hm52ru8i92/pozosimi.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4f8f2ba4---24016946378.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607366e5b4873---85772957248.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607826bac3e72---36515648132.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/hd5b30n0q0ho41p4r74gnb81s5/mimekajolebowomen.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c86d4e80e---26175776127.pdf
    • http://svsteinfurth.de/radsportfiles/file/88068888295.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/54cc0aec65ef21a948ff69ae3ebb66ba/lojubinowa.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/6ptottomjh7j660j8fkdqh9vg5/44822990442.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f687121ed1---55658282550.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/1347fbb123c40c92b91f0ca4cafea48b/pogorerudobonodufipagu.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e730de15f9---fuwivisigotiloji.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/89fe7ca1dd5d91d772df0ce5c447f570/pujinijewig.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a855d220607---pidek.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_off0000de4f.bin
3bd23f5796e66a7dcebc4fee26472dbd20f1d7c010c4e598f472d5818ef4cb59
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4F 4948 bytes
font_01_sfnt_off0000ef29.bin
e9d9df99bbaf6f5def92151c1e077ef5c702f3a27afe21239e65b81640313634
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF29 12840 bytes