Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a20781c121f68c6…

MALICIOUS

PDF

77.1 KB Created: 2021-01-03 14:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d26eef34be10bdc620c672fbb3e3c475 SHA-1: 9efcc8344a5a6694ffa7756d609ec9ffbcf8705b SHA-256: 2a20781c121f68c62eb1db9c6cd51a13c27f85592fe15330980af4277feb8c58
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 a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Da vinci code trilogy inferno'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://trafffe.ru/123?utm_term=da+vinci+code+trilogy+inferno PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5f927429993eb.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/nesafoxiro-besiwupivonoto-jepanotine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5ff0f45132222.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/AWcgchd/best_deals_on_65_inch_tvs_today.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/3029578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469852/normal_5fdf4b3796414.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/a5jehab/pinballz_austin_happy_hour.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39dfa4cf-fc9e-49e1-b45f-179a6561e3c9/vunugamededusixunupafi.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/72930611327.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 5172 bytes
SHA-256: 83fa3c8f61d3e066d1c6785eca11af5ae61bb2873d3d2f528d53a69632033c5d
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 12736 bytes
SHA-256: 7e43ed6e8cf0924fc68392cccfa0d5a57308ce6fbfaeb4cc0fbb73e9545780e5

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