Malicious PDF — malware analysis report

Static analysis result for SHA-256 9783190a9cd4dd2c…

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 06:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b82d5c0f1457d08999902b7bf9f3d381 SHA-1: 6fa390819477eb95d8f385167c181f570da459a5 SHA-256: 9783190a9cd4dd2c50f7aaf5b78e0bc4025950f5ee939527725f453d61a8ee51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=how+to+plant+onion+in+water
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/95b00709b1c3b8466ee714bf14725e40/98197596773.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/4dnc4e6nc76u5uun3pn39ol1r9/mozug.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/84816139027.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/g18q9e484rrfi38c8hsd64khf2/37042949835.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778fe1615b6---todasetisameguxufej.pdf
    • http://shinies.ru/img/lib/file/mudopujamedifezupuxu.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efb2f698bb---62224046542.pdf
    • http://automotiveenergy.cz/userfiles/file/ribegovedogelokamotedase.pdf
    • http://samtekelektrik.com/files/98606339629.pdf
    • http://eia-edu.com/userfiles/file/41948992139.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a105548447c---23118134820.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/02950bd2dadfb3a81bd13748af21e921/sesujodetadedefagobo.pdf
    • http://delannahotel.com/user_img/file/34790542990.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/4ebb40443e0481d031a3f04f41be7cfc/tuwizewewemosebawexidulel.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a81604609f0---88493000319.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d61c0725458---nukagowareju.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075fa78b515f---7396020138.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/757743f6d07170cbdbe44967c08b9ef9/xogupufezu.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51ff239148---jabeketuwi.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c3ca0ef41---60048119094.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/dd51f401cab604700aabc449e353f0b4/xosixajokadowanow.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b520f2ce8---putabetaselis.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/a11sdbo8jvtal9vgfjr9fnvvg3/kozedagutarok.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/7a8a02567541ed7268a0f5d1464aa541/58282603782.pdf
    • http://iswii.net/ckfinder/userfiles/files/pijujudedewawalaneji.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_off000104aa.bin
866324257d6bca9e2508da92f13ea30ae35224324587c7408e83f20ecf7684ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 18592 bytes
font_01_sfnt_off000133fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133FB 16792 bytes
font_02_sfnt_off00014c12.bin
190aca692e481ba8921dbc1b25873a30ebeffe84bd30faf7e6cc2dd7be36f2ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C12 10152 bytes