Malicious PDF — malware analysis report

Static analysis result for SHA-256 318d0a84b481c651…

MALICIOUS

PDF

69.2 KB Created: 2020-11-18 04:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc3fed2041ad6be7123492f9e144f8f4 SHA-1: 78da1baf0f7ca7a15be9bc96c7658a6e82c1614a SHA-256: 318d0a84b481c6517b47ee54484d7942a1193469b3666e799b4e6d12961e0df1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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/123?utm_term=titans+parents+guide
    • https://cdn-cms.f-static.net/uploads/4417669/normal_5faa20feaa7e2.pdf
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f913164891ad.pdf
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fa45ee8dee14.pdf
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f8f836ec6003.pdf
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5fb3e88e5bd90.pdf
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f99290431506.pdf
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5fae95636bc65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wujixus/free_high_school_chemistry_textbook.pdf
    • https://s3.amazonaws.com/lorifawuvawot/44161774696.pdf
    • https://uploads.strikinglycdn.com/files/7f771fc2-c0b6-4449-893d-0d51c04dc5f3/xotogukiberikajaloses.pdf
    • https://s3.amazonaws.com/libeganot/buspar_reviews_2018.pdf
    • https://s3.amazonaws.com/rujimidujek/jituwu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d245.bin
b2c67dbdcc1ac9d6d5b9f5557fd5ddb072c1b0a938ebf807703fcb2cd216a5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 5044 bytes
font_01_sfnt_off0000e37c.bin
0d6a285302b33523f1214374a62f7b8c6e340907f615c6196bd83689bb3494ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE37C 10788 bytes

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