Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff1c7cf049ed13c…

MALICIOUS

PDF

116.1 KB Created: 2021-08-11 07:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7b4c2cc190ee1bf46a64143a4de6d417 SHA-1: 230de70ca286600d571629550d30b86a82193ed7 SHA-256: 8ff1c7cf049ed13ca369be1ae57459100e330ea742c567526c6eeaed78b31061
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan detection. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF link farm heuristics and embedded URLs indicates an attempt to distribute further malicious payloads or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4259

Heuristics 5

  • 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
  • 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 http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16113126d5a45f---luvosuwelanofa.pdf In PDF document text
    • https://tonwen.org/userfiles/file/gexonamu.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df6ed871b7a---49589498496.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/853180314.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/24377728606.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0be29300---5775701178.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/75857243892.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89f8b865b7---24048252576.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/urve704n8e3b23ft5a48v6diek/felugejovujususiganuwukus.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/ximegoruwebula.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/85f906ffavhu5enfh51cptfg62/gutosoroporarud.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/26a47b6c82964d0e466ab3b1aaab8b0d/77597006920.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/zepejotovakizibim.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/1lcmhvmdorcodv730mq30snsn2/betama.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/80tn7b9kiv6gqbtiqvdg1vdj6h/jotekujezobetule.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bda2715c3bb---xujeragarumajok.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/973hh8mkjsq4ofkpulijfncpc4/futigu.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/vefonowebijelurelog.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31967ceeaf---wafazebogadufekuka.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/53424452247.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2de2ca2d2a38a52e1c6e3e0319300b99/135290121.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/48461361444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=indesign+interactive+pdf+example+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000189db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1F2 11168 bytes
SHA-256: 1b7201a208bcd12f67e8b11e78bae2691fcef2ab3829a137f8ebb3d1e5d70c43