Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfde68d31cd9ac7…

MALICIOUS

PDF

66.7 KB Created: 2020-11-26 10:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c0c3da90ce0f9750d0bb5365a5de199 SHA-1: 7b00dd93b9c5d5e9bc016a70c9a3f8c9f2b0923c SHA-256: 8dfde68d31cd9ac73ee966052c6204ea2835ed68a5915a5ab62595477499a3f4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI was found embedded within the document, pointing to 'https://traffset.ru/strik?utm_term=science+history+institute'. This suggests the document is part of a phishing campaign designed to redirect users 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://traffset.ru/strik?utm_term=science+history+institute
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f96ba546b84d.pdf
    • https://cdn-cms.f-static.net/uploads/4501794/normal_5fae9e549fe5b.pdf
    • https://cdn-cms.f-static.net/uploads/4459936/normal_5fa147a5c51cd.pdf
    • https://cdn-cms.f-static.net/uploads/4478387/normal_5fb3ed932a80e.pdf
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5f94afed6a4fd.pdf
    • https://cdn-cms.f-static.net/uploads/4483365/normal_5fb9ebbb67e6f.pdf
    • https://cdn-cms.f-static.net/uploads/4455198/normal_5fadabc7eb58d.pdf
    • https://cdn-cms.f-static.net/uploads/4447649/normal_5fb2f67378538.pdf
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8d9e087f0ba.pdf
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f9a131e076df.pdf
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5fa26aa2e873b.pdf
    • https://cdn-cms.f-static.net/uploads/4419206/normal_5f97fa6459a7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leributafa/34433862556.pdf
    • https://s3.amazonaws.com/salosibejodod/dd_3.5_magic_armor_enchantments.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_off0000c9c1.bin
835199784b0ec3566965a859eaa94cbe8b31211c4013a09e51b355e0193e0464		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C1 4848 bytes
font_01_sfnt_off0000da46.bin
d5347aa427f69a97db5f0ce0f8d951c177fe2ac60b8418ea517875ef634033b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 10504 bytes

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