Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4950c8a7e693ee…

MALICIOUS

PDF

225.7 KB Created: 2020-11-10 13:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f5f10ff1724a8b1548469bfc3b508ce SHA-1: d526b691ab00325df1f58672e2330f12c887610f SHA-256: 5f4950c8a7e693eed19ef03914246a9a4125cf90c163140a0b26532c5a0e8bf8
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 'trafftec.ru', which is likely the primary malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially harmful site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://trafftec.ru/123?keyword=warframe+dry+dock+map
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/kimutubuzo.pdf
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/8988294.pdf
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/5407547.pdf
    • https://ledugatikafaf.weebly.com/uploads/1/3/4/6/134693541/8575819.pdf
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f929091a72be.pdf
    • https://novebeze.weebly.com/uploads/1/3/3/9/133997241/dipodusopego.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f873131aedf3.pdf
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/c5e38fc1c76ff2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d8f97278-97b8-4025-89e2-944c97754b7c/filmes_mega_hd.pdf
    • https://uploads.strikinglycdn.com/files/185653c3-0265-45da-a58f-477150f0a0a8/79317092650.pdf
    • https://uploads.strikinglycdn.com/files/3acacc39-c6f0-4d53-8c3c-6e7cf37eab69/dilumolekujajul.pdf
    • https://s3.amazonaws.com/xumakomowi/xosupijegobuli.pdf
    • https://uploads.strikinglycdn.com/files/253fe7f2-df0d-4e75-b590-b1a703648613/renivokizazobufanaj.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000327a9.bin
756ef89f66720aad3be8c73c51ff81eb81cdfad82309d4a02bbcd2739b56e4c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x327A9 5268 bytes
font_01_sfnt_off000339a0.bin
d2ca36934a25b629e1bdcef38e280ce906f205fb3fd181fb2d90deee3e6f7bde
pdf-font-stream PDF embedded font (sfnt) at offset 0x339A0 12388 bytes
font_02_sfnt_off000362db.bin
4af6ca88fe434d6c8775d55e970ca7c029f210432baee6da101d97a6ce4a1858
pdf-font-stream PDF embedded font (sfnt) at offset 0x362DB 16396 bytes