Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7ee187eb135b8d…

MALICIOUS

PDF

83.7 KB Created: 2021-05-10 20:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5941c675a5930b1cdfc101610849e66 SHA-1: c1d37b5294c6ce9329fac53a3ae96b5fe947d215 SHA-256: 9e7ee187eb135b8dcca06ee696e5a8fcd2714e2d58592ff6e3f4c7ef403af0bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites hosted on compromised WordPress installations, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of numerous links to potentially malicious content points towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879747b793e---powuzekalazamu.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/6e1c69e09476f43305e98ff47843f975/gubopapezilad.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718724cdbdd---sukem.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/53b0ecc926470827b81bf405effcc70e/renozezawega.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/59ijuurbcr066rskgj3oe2jb4bhbsrri/66950293815.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/dvsk05tclak418hschgqrc3b61/73345893913.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f31920088fba22d2ddcc99865ac7d569/9640395225.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160936a3596dde---39996307295.pdf
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef5a4b5e5d---gipozedabeloga.pdf
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf737696cc6767e5a35a086a2424cb7c/tegozopufa.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9749996dc---lemewixulodesasefakoxili.pdf
    • https://alakharia.com/public_html/userfiles/file/39391195352.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894372abd40---48652591248.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/8e5bd62fcab7dd883317144da4361091/rifesumewofotajo.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/893f97b09858e475bec7c74020262127/xenitenonoravaxijitisi.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d05593fd27---jerutebilanemola.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=business+ethics+journal+article+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108e2.bin
535c6a3ea4407e97041f35cf0904c889f91dcb3fa36af65ed48f8c4fa8a5e946
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 5368 bytes
font_01_sfnt_off00011b27.bin
ba0e011d637262735bdd51c426666b22c4ea89e8e1a6842c6491f71e320b168f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 11972 bytes