Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb29a44e15b814e8…

MALICIOUS

PDF

77.1 KB Created: 2021-06-09 23:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3480f2060610622da601be95124eb68c SHA-1: fe281e8abcbeee15431cd8175adcf9ce73c42e4b SHA-256: bb29a44e15b814e82e3ba6acaf335858f72b1a55e5a1533c08fb2e7dfc84ff7d
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use WordPress plugins for file uploads. The document body, though heavily obfuscated, contains references to 'Vidmate download 2018 hd', suggesting a lure for users seeking software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=vidmate+download+2018+hd PDF link annotation
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f0f39f3ec---22704481861.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/1713866499.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/jakizuduvosaw.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/kawilefuwoxaj.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/31726181225.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/u5ftvs9j8qu0kschmfbgfdlmdd/70688369828.pdfIn PDF document text
    • https://fallsplat.se/file/negejuzuvevesagifizaf.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/sulakuzogupamisisoge.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210513104724.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c72bb77443---73996598153.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607717e866ae5---26798341283.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada7cfaae5a---rapedobobazalu.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782f2bd7994---zobexufexox.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/19701497518.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080387987150---repetivobobusoxefuravuv.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739270975cf---60136840643.pdfIn PDF document text
    • http://qca.ch/userfiles/file/bugezunepamegasu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/444d049768aa842373e3577ddc54fa16/71654222619.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 5368 bytes
SHA-256: 9631e0961d208dee46592a726594fe6df2cf9e369e99bec8956f2d7cf795dffb
font_01_sfnt_off0000f249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 23764 bytes
SHA-256: 2035753550c73c67a861820da951624626bc5e775833dd1d73d72e31aa953578