Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee88783ffa0d5fe3…

MALICIOUS

PDF

70.3 KB Created: 2020-12-30 03:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: df87bd4bb1c525b488544d80593687e4 SHA-1: ea5e8cb90f3426f7f294a59cba5a83155531babc SHA-256: ee88783ffa0d5fe33cdef86e68dd4d041ddc2d08ae61890fdecad0a2649ec51f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/strik?utm_term=grass+cutter+animal+picture'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=grass+cutter+animal+picture In PDF document text
    • https://cdn.sqhk.co/tukawezezo/Kifghib/81800466251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5fb48cfa7b5bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5fe4630aee487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5fa7d91bb0353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f9668652d71f.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/ies4gjx/metal_slug_2_apk_mod_unlimited_lives.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/Mifgcih/tezogizomizonetuda.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ij34jcq/download_game_shadow_fight_killer_god_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5fc0558a7ba75.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/3NlpgiM/xotesolinesedaboretigonuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/simpsons_tapped_out_donut_generator_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/79105486095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/767a6bbf-e48f-447a-88b9-c68643ea8cb4/alice_miller_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252c68d2-b1ed-4ae7-add7-54b10daa7413/pufevakovapigujobelodazet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b265ab9-5019-471c-9d8e-c2f9131852f4/12814567106.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_off0000d495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD495 5108 bytes
SHA-256: 9ff2dad2707d653cfffb7ed25d0b4c0e113dec9d45dcf0acbb3a1996636aac9a
font_01_sfnt_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 11356 bytes
SHA-256: 3fdc253fd95bf22a213317cc325eb783cb4ccf45ce9afb9033157d6dc6d52b37

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