Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8895ecbe6f1e5bb…

MALICIOUS

PDF

75.4 KB Created: 2020-12-31 08:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6b6505886d6abcfd587d3ad3958ed17a SHA-1: e0927f228772767b109b4df571164c862d36e800 SHA-256: f8895ecbe6f1e5bb0578f51f39bd5e6f166f2a10a9b366bef97134c0264efaab
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafftec.ru/strik?utm_term=battle+chasers+nightwar+character+guide', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafftec.ru/strik?utm_term=battle+chasers+nightwar+character+guide PDF link annotation
    • https://cdn.sqhk.co/mibuxedufexi/6hjwgi1/40059103034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8a6f4645e59.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/cUgc4Uu/xifilajedulutolufuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5fe907e2c5a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425010/normal_5f9929795ca11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5fa1224823818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5fe0b3d5e9298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5f91a3906f99b.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/ddb273ec-12f4-4de1-b0a0-d1d5d28ec83b/padi_divemaster_knowledge_review_ans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138e07a6-bb3d-4766-a64a-8904304a54ea/kuvixos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062963ec-3dc1-4812-a4db-dcffa8d6e39d/58181981472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8bf794-fc5b-46e3-bb0b-126f0e359a3b/tic_tac_toe_classic_glow_free_puzzle_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df63b0a-fe1e-47fb-87eb-0d3900e851c3/gumoxekamuvukige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4328ec-ab55-4eda-a8a6-3cd09ba8d37b/51761868700.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_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 5340 bytes
SHA-256: c26907e0d0e975179019f58a047f44d2d81ef61496674ffaf4689300a1235db3
font_01_sfnt_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 10892 bytes
SHA-256: e22f14a8d5a43a241f2b97fbcbe211a92377006c3bf1d90ecd2aeee01fd3227e

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