Malicious PDF — malware analysis report

Static analysis result for SHA-256 479ecf6382f07b6c…

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 02:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d2e3f6c3fa6088e027dc1762b51608c SHA-1: 6b8f9e15c982ef61bf9e6648bb73bf9ed7aa66b2 SHA-256: 479ecf6382f07b6ce284d13ef65394cc473e972176b847d7b4447a34158ab4c7
156 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous links pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://jeyadhurgatemple.com/userfiles/file/19401226666.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/8b63cc0ff5dec4e7e5bfbec518c67df3/muzol.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742cb9d63d0---kumulonot.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/vopurisavuwaxatoro.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e51bbd2495d8258d7e2845c916bb8760/wejujoz.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8d8352190c9507dcd07ba478b0d38445/bokutofotozanixokakapisu.pdf
    • http://www.anclupnapoli.it/userfiles/file/rubivedu.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6a540fb9b---99624562038.pdf
    • http://romanakladatelstvi.cz/userfiles/file/mokisudimow.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608543eadbc92---37017037615.pdf
    • http://zigzagontwerp.nl/sites/default/files/file/xibewawesajupuzikojaja.pdf
    • https://topclassgreenery.nl/images/file/84193359.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/85694843851.pdf
    • http://etpatatietpatata.com/userfiles/files/64941657252.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081caf0197a7---fowevadilasanujugom.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74536e896d---maxeva.pdf
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/rekufugid.pdf
    • http://biurod9.pl/public/userfiles/file/tabonimitufejitebuvujeta.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/949a4d831a83fd298b709745dd104ef3/vawokatekidob.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d13326d59---jogupe.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c63218061e---bilupu.pdf
    • http://kco.su/userfiles/file/velenovadapobudoje.pdf
    • http://wib24-admin.de/uploads/file/bapufowajibadujekapapi.pdf
    • http://septumdent.com/img/userfiles/files/busagatinalexurike.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=opposed+type+engine
    • 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_off0000f0ed.bin
d17a96ef5b08bbc530487d2f47a496155fc4dcb4ebaf397e21935fb19ffcfcb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 17480 bytes
font_01_sfnt_off00011df9.bin
b12c9bbfb6503c3324d0cb1f4e40ea91846c532dddba8168ba2238a53681547a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 10396 bytes
font_02_sfnt_off00013574.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13574 16792 bytes