Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f048aab4cbaef42…

MALICIOUS

PDF

79.2 KB Created: 2020-12-21 22:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f410521a8f4b37fe3c3a64b125f33172 SHA-1: f960387c5f6b98974165b06fa6a83093e60e4620 SHA-256: 8f048aab4cbaef4279a8905e7afedc24f429da7c81478ef8b1b25ba86be54c99
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Obsidian butterfly'. No scripts were extracted, but the presence of the malicious URL and the overall classification strongly suggest a phishing attempt.

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://traffset.ru/123?utm_term=obsidian+butterfly+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fd281a30745d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5fad1293e346f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fbbf7d8d039f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fb8e580ef4c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/davawina/74158764302.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/jokonarajufex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29eebabaecd33182d3b3b/t/5fc8b4f98bd7793567578c0a/1606989051589/knights_of_columbus_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/thinking_with_mathematical_models_answers_ace.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/xonevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00635ff13940aa23ad6dd/t/5fc1bd02e18c5c478e3c4fb1/1606532354398/guba_and_lincoln.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bce8a13a450bab05ef87/t/5fc8853d8eecd53e39ed4d86/1606976831359/63968179141.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/goguviduvumatome.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde879f44058d21a0e474c5/t/5fdec1d6a3b92b153c2bde6a/1608434135906/93972085389.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5076 bytes
SHA-256: 289caa206231c26cae7800b481b8b569e74c0aa79bc9e4c2dd806b850649b975
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 11512 bytes
SHA-256: 959a5ad0d64a50dffb03116e116d6dff001c28f82bbafc4e2d4b33604d1a5285
font_02_sfnt_off0001221b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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