Malicious PDF — malware analysis report

Static analysis result for SHA-256 811600e9391569e7…

MALICIOUS

PDF

75.8 KB Created: 2020-12-10 06:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb2c3c0b62d525b85323365d9d96f1a SHA-1: 1667cc95331029af1bdf08440799959a3c1c8e09 SHA-256: 811600e9391569e7d477838959772986c48a75c0c9c62e72b913f190169868c6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the presence of an external URI suggests the document's purpose is to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafffi.ru/strik?utm_term=greater+mirror+image+pathfinder
    • https://cdn-cms.f-static.net/uploads/4450640/normal_5fb291fe5f4d9.pdf
    • https://cdn-cms.f-static.net/uploads/4417321/normal_5fa6319f3debb.pdf
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5f948d8172963.pdf
    • https://kapekutom.weebly.com/uploads/1/3/4/4/134437999/264898.pdf
    • https://vefotufujipewux.weebly.com/uploads/1/3/4/4/134401009/3627864.pdf
    • https://nobokoxevukaj.weebly.com/uploads/1/3/4/7/134755509/dacde18be.pdf
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/jurigakafizexin-gitosoranewaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bepukuba/medicine_dictionary_apk.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/kendo_mvc_grid_client_template.pdf
    • https://s3.amazonaws.com/sasufufa/5642904366.pdf
    • https://static1.squarespace.com/static/5fc00874a5bc066edfa0f7a0/t/5fc119cb3c02f22b9d345711/1606490571488/wujapejuwum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf7a.bin
7b725ee5202b12be63844c028d7c0c2abeaadb91b1ab8c1bafb2f5b7e5fdf362		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 9056 bytes
font_01_sfnt_off0000ed26.bin
c087637c0f601e7a02415869dd1dc9a01fd7e095c7b216a95d6b1e5f6715081e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 5276 bytes
font_02_sfnt_off0000fef3.bin
c542894ea8b8f27c10a1811f8e676cc581f53b2c72121d78ee5e023124583ca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 10244 bytes

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