Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b60dcdc505a09a…

MALICIOUS

PDF

70.5 KB Created: 2021-06-20 02:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a827d11b61e046bb9e6446c79cc476fe SHA-1: be1054aff2e515e9b4a4d15b23b6bcc08a882eb1 SHA-256: 12b60dcdc505a09a43e59072cb44aafb42e47c53ca43d1028fb10fc2bf077fba
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress installations, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm characteristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/uplcv?utm_term=rota+ooh+shrine+walkthrough
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d968128a5e9a8767f7f14ffee063b68/ruwufelajavisevisavani.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0cvhiohvm59ehl8g52dhrc385m/penipam.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/bc45a7dd5d73fce815dc97384abdf7b8/guxisajele.pdf
    • https://northcoteplaza.com/userfiles/file/98480393817.pdf
    • http://sys-svinding.dk/userfiles/file/kabowolifu.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a6acb6a63ab100a746c82837e93bb0bb/tibaj.pdf
    • http://pcccphucvinh.com/upload/files/rubinutulosutolorubarav.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/c377f5ef78ffe6cf3991b5ac364d3dc9/xilagefaganel.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9ae7b01c5---makelonoweralepelatorase.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bd2c21638---magelorapo.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/afe664684681610a2a1d4af5e592cfb5/89189425810.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9e28dc1b---22029797830.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d39d2bf3e---78670018036.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/6un1hieqird5vdkj7odlac9i4n/levipuvolukis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d5e1.bin
6501f0a16447df0f5fa1e57d04822abe1c1163f82648dce43d9a079116071221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E1 5112 bytes
font_01_sfnt_off0000e755.bin
11d065346c5e132e62ace63428d0ab26471d0df13f68f58275c2e7361bcb0e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 11196 bytes

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