Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac6c4fdd65bacf2…

MALICIOUS

PDF

76.2 KB Created: 2021-02-16 14:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 95e43f2a7ead327c79b3bce5ce4596f4 SHA-1: c11cee602e8efdb3d3d6c116920ac75f9674f542 SHA-256: 9ac6c4fdd65bacf217e9fb3c130719d50e7475f30f7e054e9622729de7721587
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=gilded+age+food+problems'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=gilded+age+food+problems In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369322/normal_5fe5a59e1df49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_602b5b6d8eb6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_5fcc04302608a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_600611740f1cc.pdfIn PDF document text
    • http://tublitalia.space/letra_de_cancion_el_uno_es_un_palitow727u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5fffb91ecd98b.pdfIn PDF document text
    • http://appletopshop.ru/csgo_commands_for_1v19n941.pdfIn PDF document text
    • https://cdn.sqhk.co/zonelatu/siijbje/phone_number_for_closest_t-_mobile_store.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485828/normal_5fcc9c3591359.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hedkYif/soccer_paradox_2019_free_arcade_football_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_60261fa5d5e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_5fe7c8546d828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5ff3decde41db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_6009e6acedbfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fdbda9a58168.pdfIn PDF document text
    • http://remontnatali.ru/perl2exe_user_manualullyu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5fd6a3027dee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_5fd91fda77cbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemunedipu.rf.gd/wisigizewagiliz.pdfIn PDF document text
    • http://toxuxefegetej.rf.gd/consumer_reports_best_sedan_2015.pdfIn PDF document text
    • http://nagajawonusagu.epizy.com/80296563660.pdfIn PDF document text
    • http://jisizulo.rf.gd/69271601121.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_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 5532 bytes
SHA-256: 7213f0c4e9c233e7071910fe9b9deb4a9ea9cdfae82e8696139d0316cbe1e33f
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 10372 bytes
SHA-256: 3c6395b6aaee4bb1c60e1e1708c19d97e81309826d7756bae65dd85ffc3fc9d7

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