Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e15febc3008aee…

MALICIOUS

PDF

65.6 KB Created: 2020-12-21 06:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3142e0facbbada5f35917424d40a8b13 SHA-1: 1bda1b630030df5c716a981e8a938f1bf8a1c59d SHA-256: b7e15febc3008aeedb67f71162a0c861179e886088f6b96aa292293b596c47b3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Aoe 2 advanced build orders' to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=aoe+2+advanced+build+orders
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fc80c2715a62.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5fdc532162d01.pdf
    • https://cdn-cms.f-static.net/uploads/4456728/normal_5fa02035d5a91.pdf
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f941d0c712b4.pdf
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5f92d0c88c4a6.pdf
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5fe026416fac8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/957f4e26-1c4e-4881-803a-b9ddcf746c77/xinet.pdf
    • https://uploads.strikinglycdn.com/files/4fddf686-65c5-4b82-8858-b4e0017ad317/biraburuduzunuwenulav.pdf
    • https://uploads.strikinglycdn.com/files/0532e058-7917-40d5-938a-9a0c87f2bffe/rabixedabedaz.pdf
    • https://static1.squarespace.com/static/5fdfcc855fb7d01a9b0f17d4/t/5fdfe32851a86c1b6c462e91/1608508200358/free_eviction_template_texas.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_off0000c43e.bin
ac68cf1242905a85e7d9b62fbf2e9cf0ffafdbb9d6c8478b5e4682babb74ff1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 5252 bytes
font_01_sfnt_off0000d62c.bin
1f0a2929fcf9ea416cfceac1baa4817ed3ec02c75297ed0d997bad18f51df48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 10524 bytes

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