Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e011c61f7ffe5d…

MALICIOUS

PDF

85.4 KB Created: 2021-01-01 20:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4321df7f01a47cc2e0b9d5081e02f29c SHA-1: 78da34df24e825ed3b20c7e1086eccc71e815d0c SHA-256: 57e011c61f7ffe5d0d38ca6e6f0047f77fcb771cba976e043e68873472e38d1a
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 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=cookie+crunch+matching+blast+puzzle+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fa09bf2e30f0.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/5lXhhd3/mask_virus_protection_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/eWidBie/sputnik_russian_alien_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f87577286bf8.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/fgc1Qj4/bupejokip.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/gfHSjg7/affordable_house_painters_tucson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fd84e6a369e6.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/4sPKhfP/xemibebejuraxixuxarip.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/IigVH1V/tomorrows_race_cards_at_york.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5f8dc6ab1048b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2072e77-94bf-4cfc-ac57-f4b3a3e95d83/wikek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316067b4-0ccf-46f3-8b69-2870d964627b/sensory_physiology_ii_vision_lab_report_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b3b284-90b8-4217-9ea9-f71a8a4058ca/super_mechs_hack_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dcc015a-fbf3-407e-aecc-68ce660d64ad/89893250055.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 5504 bytes
SHA-256: 31a84557ecffa46c143c9bdf937be71d16491ec4e4178046f6259948e4e194cf
font_01_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 11868 bytes
SHA-256: f1afcef540c6db28c001288a73c41d3c0a3bd2e9aa1bad248153a61f1b10ec0c
font_02_sfnt_off000120d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 11124 bytes
SHA-256: 3d0d2293f8b1fa3b85a2554263b79a7508b960fe91ca80eec05fe4121e35f0a4

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