Malicious PDF — malware analysis report

Static analysis result for SHA-256 914649bc9b0a00dd…

MALICIOUS

PDF

66.9 KB Created: 2020-12-21 23:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4feae0a45fce4626a633fcde02b31e2 SHA-1: d2c9388436c572ae03c9b5cca012256c8846bbf3 SHA-256: 914649bc9b0a00ddfe45481d5fa4307f7be96f434895c252fc957a7a14ac8268
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into paying fees to receive a non-existent prize or parcel. An external URI, 'https://trafffe.ru/strik?utm_term=du+law+apparel', was extracted, which is likely part of the scam infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://trafffe.ru/strik?utm_term=du+law+apparel
    • https://cdn-cms.f-static.net/uploads/4460447/normal_5fd37daa8d0af.pdf
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f9855a9de8d4.pdf
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5fbc04b58c66b.pdf
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5fa2bd2ee32f1.pdf
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fab561ddaf14.pdf
    • https://cdn-cms.f-static.net/uploads/4470209/normal_5fd2a00131113.pdf
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fac45f366ac7.pdf
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fd24fef199e0.pdf
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5fd349d83c3cf.pdf
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5fdc233aa4b56.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc2b818a13a450babffe01a/t/5fcec0d7505b451de177c4b1/1607385306318/pitafusogawow.pdf
    • https://uploads.strikinglycdn.com/files/4112b139-1045-4ed0-a62a-06f52b96c6b2/namanezeviwud.pdf
    • https://uploads.strikinglycdn.com/files/2ef7f038-dbeb-433a-a766-47556f541a37/voyage_au_pays_des_arbres.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_off0000c6ec.bin
c0638a583b1efbeb2cb1a88e823d471faf9988c0159c01a07df5e25c40abf45e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EC 4724 bytes
font_01_sfnt_off0000d727.bin
0ba43a6396cdfb07e13a1a73dc9f93db79a3657d4aeba5fac72ebd5f10bcf1f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 11828 bytes