Malicious PDF — malware analysis report

Static analysis result for SHA-256 debb8629b7605ab6…

MALICIOUS

PDF

93.1 KB Created: 2021-06-19 04:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 417cde51e1eac79dc5700ebfecc765de SHA-1: 66f91aaa8392a58762a7eeab7519ed2dd9ea1229 SHA-256: debb8629b7605ab682ee97c8f9d0a5e9d83c862a705287dcd876042a28339843
156 Risk Score

Malware Insights

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

This PDF document contains numerous links, many hosted on compromised WordPress sites, designed to redirect users to external URLs. The presence of a link farm and the ML classifier's high confidence score indicate a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links strongly suggest it is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://huntic.ru/uplcv?utm_term=skarlet+from+mortal+kombat PDF link annotation
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ce9f93c3f0fc28aef2c4aa2e846b963d/mizewezanabezonedul.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609488ab40918---67072669501.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/9vp2nbh9pkt03tqkuup91pjju5/80174237277.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607981a88cbfb---jediz.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608363fbbc584---6526596067.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/zatabijiliturabuzutibo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/p7re3dr3o87hl9qt8m72mauqeh/36150226154.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/3331288b2e89c34a444a9d53a5b6feba/selefodukaxeselim.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdec685c97---nidofisirabufivizix.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/26092f691025f621cd366ba6494a4d28/sorabob.pdfIn PDF document text
    • https://areicon.com/images/file/varutedefekofo.pdfIn PDF document text
    • https://t2sc.me/userfiles/madakosexegutewu.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/jcm76ov5o5llj4h78ak99mnv30/48973453561.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/ad583b0827d0c0ef0144ace0134d1781/jerigutovikujitiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12133 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off00012c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3D 5040 bytes
SHA-256: 19e36eef9893d0d34cdd39bbb911383f7ab95db3795d90106c2db4f7f058c108
font_02_sfnt_off00013d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D50 12624 bytes
SHA-256: e2c201adb145ad383edb40c5b838213c0e432b3d488ea8c45301cd9c26eb68b1