Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dc0ff43c86a598…

MALICIOUS

PDF

144.1 KB Created: 2021-06-17 08:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9229031b4f35b2495826706593958ecf SHA-1: e6bea2a2d1022a26ff18843c31d51ce88786d31e SHA-256: 07dc0ff43c86a598d1d1b9cf66306dcc388fb2a0349dc1e6fdc016363cf97832
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. The document body's reference to 'Gta iv banshee cheat' suggests a lure to attract users to these malicious sites.

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://queure.ru/uplcv?utm_term=gta+iv+banshee+cheat PDF link annotation
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/7d8cb6f8285996bc2f737f93053f31e6/rudimepufudeworut.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kigog.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/zudavekebefu.pdfIn PDF document text
    • http://latework.cz/soubory/94474349850.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/1517a3efc0da4ee2538c8ffd6ef21555/55806476437.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607e251b93a28---11614405730.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/83038853006.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/lb3kq4r3769r6cvkhg0fufmq5r/25905252629.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/23251653816.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/58097308312.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48cfe0d994ab475c5ca1200709336fb3/xipiwulonujibizimateb.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b804454d5e---44167383314.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/47298093034.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/binividukowunokas.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/9k5ncr25gd06up1gs824ajj010/11511911409.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/5b4fff8e325832c9246546f17acc7a85/87112430526.pdfIn 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_off0001f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F534 4992 bytes
SHA-256: a15d114f39c4522cb55f39e34e77adcd46b070826b16fe5838ef109caa57a70e
font_01_sfnt_off0002063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2063A 14596 bytes
SHA-256: fbd9ef035af6fdc1e8a99d0b1d93fce367d68e57fe84a8c44b9ab27ec0aaa788