Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cdffb13a97035e…

MALICIOUS

PDF

78.2 KB Created: 2020-11-10 08:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde5d70c19852e9477ddd7f20eea90be SHA-1: dcd200a1967c262e0b7b7af2c73775fbcc78c8d6 SHA-256: 08cdffb13a97035e9eee8652488a2f050e9d74684a7b97c19fb4c8298b526f40
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', suggesting an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be related to a user manual, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?keyword=80gb+ipod+classic+user+manual
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f9bd8a836e77.pdf
    • https://cdn-cms.f-static.net/uploads/4447903/normal_5fa5570423fa5.pdf
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5f8f13b8af8dd.pdf
    • https://dudabiwik.weebly.com/uploads/1/3/4/3/134354119/kiwesagamibuwusupuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pojojagajevuxa/jcb_telehandler_manual.pdf
    • https://s3.amazonaws.com/jivala/11132280763.pdf
    • https://s3.amazonaws.com/begijufadi/25255210251.pdf
    • https://uploads.strikinglycdn.com/files/00e31934-eefa-49c9-91ae-d8cc91ee4f4e/dadefimogijufemuv.pdf
    • https://uploads.strikinglycdn.com/files/a0602081-e66b-403a-89d5-e9a64f7223a1/8005897740.pdf
    • https://uploads.strikinglycdn.com/files/c83de1fb-e4bb-439f-ad52-461cda5c60da/nisafoxaxex.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6be.bin
7a3f9ece4b686fdeaa379b75fe07025237ad3a7b0630cc4a59be3aab1f6de92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BE 5576 bytes
font_01_sfnt_off0000d96d.bin
27a3ac0d07b8631db4621d6463fb14730de54ea63135313374b468ff19b26ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 10068 bytes
font_02_sfnt_off0000fc2b.bin
e57eb45c33bc8e5f070aa54be65b8785551b579e9de8402c48b1d1db1290eac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 20324 bytes
font_03_sfnt_off00011dbd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 4324 bytes

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