Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7f0a4b53fd9fb9…

MALICIOUS

PDF

77.6 KB Created: 2021-06-15 13:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3062f7bb131b418aec6582c17596102 SHA-1: 4314147d765903dbdf0581e785c63a0a946b1340 SHA-256: dc7f0a4b53fd9fb910a68cd6ee4361f2f5a93e5595749e5489645808b92a13b0
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised WordPress sites, suggesting it is part of a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with deceptive content, likely related to movie downloads. While no scripts were directly extracted, the heuristic firings strongly indicate malicious intent, and the ML classifier output supports this assessment.

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 https://garglob.ru/uplcv?utm_term=hocus+pocus+2+full+movie+free+online
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c8ee8cd4---99431364414.pdf
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/82811445714.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3909fcc253---lumijozulazupuro.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/d66370b41e6fbc91a1eb5c7eda4e2186/wusolafif.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ab2f7ef5a76b76b6dc3f321a9a7b43b7/97534839264.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b408a889f16---82304028328.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08594918df---zadumiz.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7447a546---11595944444.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e53da2586---20489025300.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/e361f6f61e534d97f5af28f540331bda/kopot.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/49bap2spfn819ck0k6ln404ipa/nijefatanimolulamig.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/berulizido.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e91ca5676---47199883984.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b56319e18c5---zinedokuvegojub.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf20154dc84---62517946214.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://lapdonline.org/file/guzifuwixefoluxalamo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ef.bin
26b731b6fc8482305d3989d8d9d3d3fa90b0b997b25b8a6e8bfa65abaad3438c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 4904 bytes
font_01_sfnt_off0000f684.bin
ec49481c9892d2e56b50259d4407425c41a92a2bedfd8859357b4a0d2b07a7f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 10992 bytes
font_02_sfnt_off00011b7f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 4324 bytes