Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39edbeae75feccc…

MALICIOUS

PDF

66.8 KB Created: 2021-09-28 07:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66356b41389689449ff2d8ca78b2ce0d SHA-1: 7d9d377a0f99c0b28478d73e97e31502c1c468a0 SHA-256: e39edbeae75fecccf2e68bc0033887a04e8824d4aed3af31b9f4494971eb0c7b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and numerous external links pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm heuristics suggest it's designed to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://alptw.com/images/files/33169978050.pdf
    • http://cortocircuito.trialpanel.com/images/Upload/files/67354900114.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148d34e5df53---72564507048.pdf
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/wojuwirilugoxen.pdf
    • http://paolacaone.eu/userfiles/files/goponi.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/03b84ed64df35fce6e3b85c489ab15e7/xaxaxubisodosurupavi.pdf
    • https://kermiradiatoriai.lt/images/files/rotiwamizemufigifoda.pdf
    • https://clubon.top/uploads/files/tunaxufenidosenowelumazok.pdf
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/86118357925.pdf
    • http://poddertradingandindustries.com/userfiles/file/kiperazunuvugonenimexuzar.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9bee1c43f---78469728619.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614583be366a7---94490619046.pdf
    • http://www.saito-ken.jp/userdata/file/83081451106.pdf
    • http://getampedmag.com/ckfinder/userfiles/files/fedenemukasono.pdf
    • http://studiotipaldo.com/userfiles/files/76865150191.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614b4e102f40e---fidur.pdf
    • https://eminentland.com/admin/userfiles/files/xokijinupunuzesonilejogo.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/7bg2an2adned9vrodd4glf9a7i/29256013107.pdf
    • http://www.jucadent.es/ckfinder/userfiles/files/laperapumobapefatataw.pdf
    • http://fine-cottage.ru/userfiles/files/polidosifanaxemi.pdf
    • http://scea.edu.mn/ckfinder/userfiles/files/37537316519.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tivimate+iptv+premium
    • 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_off0000ac8c.bin
7b60bee98d504dbee01bf557e1fcd220718ddcbbb863fbc2991439f3d1af68fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8C 14144 bytes
font_01_sfnt_off0000cfd2.bin
38f99242e94e3c25d581ec6cbe3c9c15c4c1cb9c7e0c4f31d56b75f4807e331e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD2 10104 bytes
font_02_sfnt_off0000e65e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 16792 bytes