Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f2e6d87bf6940b…

MALICIOUS

PDF

84.6 KB Created: 2021-07-04 22:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a657829040a74c004f9f15662dca6da7 SHA-1: 1aa3cf7ceafdc700f38778f3e36565daa4305fed SHA-256: c9f2e6d87bf6940b761239c64fd3607ae4b7c199f7be7f6574f549b005800715
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm on potentially compromised infrastructure supports its role in a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://alexlunacoach.com/img/editor/file/jonilubugozugaludiledota.pdf
    • http://www.deopendeur.org/imgUser/file/kametifeladega.pdf
    • https://ivanda-commerce.hr/userfiles/file/3055331947.pdf
    • http://venusland.vn/app/webroot/img/files/64955511897.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b531a720f---kilidob.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09a3721e1b---10936875887.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ba7kq9kem2sslbaiupk5nn3qqa/79521966987.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad99b8904a3---zumapawemesivilemezur.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/vuipmclbuei4sqgs6sb97v8150/87150246624.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9225f8b155---jokeri.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/ff6ffcbc706cc6f05fa98f326e309558/26612136929.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076c75e0f27e---21960002467.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9d5e730cf---wajobezide.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c8527e62b---79631395951.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608a77a7ab53f---52856382122.pdf
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/bozopedovexoro.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/d6t07rri19fvrtulr8b1l4r0b2/pifivuvulevifudo.pdf
    • https://cottingham-group.com/cufiles/files/65994125084.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160982ea6d137a---22675913850.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7120b8949---vonivek.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cd675ba66---jemular.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/41587293594.pdf
    • http://infinijewelry.com/userfiles/file/45892026124.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c4eeadc606f897685114f289cb26bd33/90431626674.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=lone+survivor+song+we+can+be+heroes
    • 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_off0000e59d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 16792 bytes
font_01_sfnt_off0000fdaf.bin
28b22f558ab2c705b1d0cd5652b2cd22af71c9cac489384f4594348a31da452c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 17812 bytes
font_02_sfnt_off00012c17.bin
ee50555446049454530365026008ffdc612e5d0bcc73756124f9316128878bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C17 10712 bytes