Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab3fa189c67b69d…

MALICIOUS

PDF

91.1 KB Created: 2021-07-04 13:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9c9e4634c0370779164c1a14bea754f SHA-1: f72fe4c10288a2130cb2d3efb321659d4ee6ac85 SHA-256: cab3fa189c67b69dd8c1cabe721268dda985c26e889c1fa013ab8b6dd996bcaa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware delivery attempt. The presence of a link farm pointing to compromised WordPress sites suggests an attempt to host malicious content or redirect users to phishing pages. While no scripts were explicitly extracted, the nature of the link farm and the detection as a 'Phishing.Trojan' strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/42e5e2f079d9e1b96dae53b002b9445b/12634355935.pdf
    • http://akwarella.pl/user_uploads/file/mubezemiguwededojiwupa.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdab395cc6b---dikesasanemejejabo.pdf
    • https://nmcs.ca/userfiles/files/68743374648.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fugorijatofabukasegar.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/8f8dff1f9a916b8ffdf764b72ea0f59d/mikuse.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/500254f0e42b1882e44ea3cf6f087f76/xelevuwuxikudomotudol.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lds9e3s5d5td123psn1dg7kdj1/91767762534.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c921198a63f---xaluje.pdf
    • http://barsugo.com/ckfinder/userfiles/files/zelekakogak.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160719d3fa2de8---97101161861.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c05f772b37---rababe.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082aad6130ea---2665991504.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/lagoxiwuzivoga.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df004de932---66150840097.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160757b4781e66---37289990133.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/51bb8adec9c5de573594bf8501b52152/gerakig.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28bb5f267---daxerawujodemesi.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cf414e6176c---43042028482.pdf
    • https://autoprofi.ua/userfiles/file/63871564748.pdf
    • http://sukhabalka.com/files/file/vapesofev.pdf
    • https://bloomeng.com/uploads/fosifazevumulapamagajejag.pdf
    • http://eiak.org/upload/editor/files/4012540199.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/95738f61c468d124ce220d2bcd8aa8b7/7456420846.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=small+cell+neuroendocrine+tumor
    • 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_off00010527.bin
fa2768da37d7eef647d9f9fce37e66685592b2911194f377a7a6a2b5f3f0562c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 10536 bytes
font_01_sfnt_off00011d18.bin
dc51ca986a07c780f17807e6b0198b264c0586cf9c53302c7b55a01a47d55620
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 16156 bytes
font_02_sfnt_off00014712.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14712 16792 bytes