Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b11692da519c2d4…

MALICIOUS

PDF

71.9 KB Created: 2021-03-02 10:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 7aa8409a8d15218940bc68ee9a6abfcb SHA-1: cc9a0963298aef730a166d598dd223c06ea11516 SHA-256: 9b11692da519c2d4a335ed138eefebf20af47b2e00891ae5ad59d978a3edaf99
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm on disposable hosting. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=transformation+mask+in+cucm PDF link annotation
    • http://retapadu.medianewsonline.com/37861916599.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/purabuvawofemanosedeludar.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/the_lightning_thief_chapter_10_questions.pdfIn PDF document text
    • http://purpless.vip/what_is_the_definition_of_system-2_thinkingvwdvh.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/fibexi.pdfIn PDF document text
    • http://paselon.getenjoyment.net/sapule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_601e2edaefdf7.pdfIn PDF document text
    • https://xanuvewetarew.weebly.com/uploads/1/3/4/7/134732967/rezanepiku-xezeli-deviminu-fidele.pdfIn PDF document text
    • http://pubgmobiie.com/13990345797r7uwp.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/puxupiraxiwesopuzefe.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/weber_spirit_210_grill_parts_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namepafubi.atwebpages.com/how_to_solve_log_equations_with_exponents.pdfIn PDF document text
    • http://lujatasatepixop.rf.gd/sum_of_interior_and_exterior_angles_of_a_polygon_worksheet.pdfIn PDF document text
    • http://pujumek.myartsonline.com/54759319691.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_off0000ddec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEC 5008 bytes
SHA-256: bb08d4acd82d420c1712329df344dc6de22b07e5fa24cd2084095fe69d7e085c
font_01_sfnt_off0000eee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 10568 bytes
SHA-256: 53dea391df4127baaa4f99769209b51157502864f1caff1928e17305eec5ecb4

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