Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2fe72339d1cf8f…

MALICIOUS

PDF

86.3 KB Created: 2021-07-03 04:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03e8bd09572d1c3b5cbcf1f94dc0daf8 SHA-1: 3eac14ddc0a60f02084e61b5d6abf0e18cc03327 SHA-256: 2d2fe72339d1cf8f4b84f711e879f023c746a429ece2fe40e44104a0b85bff1c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, many hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=area+code+for+tampa
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/47qkk1qkh2bprg1j2pl5j2oqsp/95763064041.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab83298a0ab---jepev.pdf
    • http://studiobaldizzone.com/userfiles/files/wimilozanatepiwigusi.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160730b5bdd235---18930356895.pdf
    • http://salkim.com/userfiles/file/8271558233.pdf
    • http://shinies.ru/img/lib/file/20619107172.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a47ff4fc1d---48361109496.pdf
    • https://cardion.dk/gfx/fckimages/file/gujimivomesewadipafidaz.pdf
    • https://imagebuzz.net/ckfinder/userfiles/files/jadutelirenosiwapagu.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/rn9taojs647c8dn0otoe6vjj35/jatavex.pdf
    • http://reversetheclocknow.com/ckfinder/userfiles/files/14542160455.pdf
    • http://chnli.tw/CKEdit/upload/files/zavesolagupajerejeti.pdf
    • https://cncostruzioni.com/userfiles/file/jeruporase.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/15246c1905952e7d6681af026c71fa68/wepavorakarotasizosu.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/f56dnqtnhkalef907ul1g17u59/80018508104.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05b299ec23---kunafomomenafusigu.pdf
    • https://ddshower.com/ckfinder/userfiles/files/pumosubobekafasutugalude.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a091093bb15---50700178479.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc2bfb92de---kitozapoziwakaxi.pdf
    • http://flightshop.jp/images/blog//file/93640604504.pdf
    • http://docando.es/js/ckfinder/userfiles/files/xobejamajazenorevi.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/7f3a34d068a93644a9efdc811fe4bc9a/95716828942.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_off0000ee3f.bin
5b5428c197f7717e73b32e77dcd100b83e1cad8854469a9927afa57b7f143021
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 10352 bytes
font_01_sfnt_off000105a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 16792 bytes
font_02_sfnt_off00011db9.bin
fd00ad7972a9b4ca7c2aa3c93b85f1831ccc8aaf5ea60e23499a3df4737d540d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB9 18092 bytes