Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff39e9afe721245c…

MALICIOUS

PDF

65.9 KB Created: 2020-12-31 20:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df4263efaaef6916c0c20dedaf82a4b0 SHA-1: 7604be61aa052c40a2f183a7f51f0971cbf5a2fb SHA-256: ff39e9afe721245ca5bff856deb5b404bfd3e4911d0080660bb0826180381b29
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.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-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://traffine.ru/strik?utm_term=callaway+gardens+georgia+cabins
    • https://static.s123-cdn-static.com/uploads/4420020/normal_5fe5596f3adb9.pdf
    • https://cdn-cms.f-static.net/uploads/4393647/normal_5fe767f3be163.pdf
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5fe6eb0027620.pdf
    • https://cdn.sqhk.co/vapezuwe/ghsijhf/bubble_shooter_games_online_free_no_download.pdf
    • https://cdn.sqhk.co/nakolore/hd7vGDw/16820356191.pdf
    • https://cdn.sqhk.co/kakumipoman/jhsPb76/wyze_camera_amazon_canada.pdf
    • https://cdn.sqhk.co/zezoxomop/hBppAia/brick_breaker_jar_240x320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2e101d29-74c2-4864-abea-6ffb235b8329/koxusure.pdf
    • https://uploads.strikinglycdn.com/files/43d26b4e-a18d-44ef-872c-aa08ec2ef68a/57771820589.pdf
    • https://uploads.strikinglycdn.com/files/4d162dad-7774-4ab2-bbc7-1cc553289b69/suzipemune.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/free_proxy_hide_me_apk.pdf
    • https://uploads.strikinglycdn.com/files/9c529014-3b2a-464f-80d1-8ad9a63e32f7/knight_orc_assault_unblocked.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_off0000c765.bin
beda4750583a16bc0b9ce966e4728d60fadcefea4a6251949b1790ec0088c5cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC765 5344 bytes
font_01_sfnt_off0000d9b4.bin
116c4f283a8ba16293534bdbcdf2124246709877be4d2ce3c149c10246cb6bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 9832 bytes

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