Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a874431e3c889c…

MALICIOUS

PDF

99.9 KB Created: 2021-02-20 17:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 366aa8fa5df267d3e3427d8bb931f685 SHA-1: fca303048011fbc1fd169604c4feef649bc7d883 SHA-256: 78a874431e3c889c162112fb2d49092992476363728912fca68de34485907c2c
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The primary function appears to be redirecting the user to a potentially malicious website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=port+royale+3+ps3+trophy+guide In PDF document text
    • https://cdn.sqhk.co/xufaribo/Hvkxjh1/momifurerupaxeruviwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_6024958a80a86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5feb04aa73b58.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/BoThfhd/tangle_teezer_wet_and_dry_brush.pdfIn PDF document text
    • http://itdomen.fun/wejosotuzaram3quji.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/hf0geFd/nuclear_warfare_nuclear_war_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/jRighhf/top_hits_2020_songs_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5fd8114669d5b.pdfIn PDF document text
    • http://fenellalucynelle.info/81953561271y8axj.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/ia7jgcd/rogavili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_600bfa6f33398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366360/normal_5ff64d8a0832d.pdfIn PDF document text
    • https://cdn.sqhk.co/foxinukepo/Digih9c/57779204211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_6023c71950788.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/idQjj0N/53978017426.pdfIn PDF document text
    • http://repair-kompov.ru/352217315278sxr4.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/hjKhgqI/eaglemoss_marvel_movie_collection_list.pdfIn PDF document text
    • http://umniashka.ru/evaluate_linear_functions_worksheetj1k7d.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/bghjfIi/video_maker_with_music_editor_apk.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_off00014c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6B 5488 bytes
SHA-256: e9c27aa6176b5f5c98651aedd21dc6f2d6794979694cfb200ff11a3bda33df86
font_01_sfnt_off00015f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F14 10308 bytes
SHA-256: 92a1d150d3386b787b02cef38774385508deebf9f1334a304d9156e4e07ea4da

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