Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d8ba375be2bd85…

MALICIOUS

PDF

75.0 KB Created: 2021-01-15 01:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2dd73e70373ad8527c4780ed2d9eeddf SHA-1: 1b81925cfeca940d261fbfc1ed8b6d599a201e67 SHA-256: 05d8ba375be2bd85c805b48e27d0afcd9ba09234216fa7ee0e5228dde5c8da2b
96 Risk Score

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 URL pointing to 'trafficel.ru', which is likely used for phishing or to download a secondary payload. The PDF structure and metadata suggest it was generated by wkhtmltopdf, a tool often abused for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/aws?utm_term=video+anyone+of+us+meteor+garden PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381730/normal_5fff066848efe.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/YTDicq3/king_herod_and_jesus_birth.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/jibbYfB/kaparelo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5fc7a886e4d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fd78cc647dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5fb4792f986af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5fa1308ce29f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/kogime.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/lixitekopula.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/72602578280.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7A 5264 bytes
SHA-256: 319839058f15f1722405826f6ed2017083a5fc602992f451b43a27495903142a
font_01_sfnt_off0000e05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 12716 bytes
SHA-256: d0855abd80549f286a5b2ac6c4da56947c13f80fa3c35b8f7d88451e946eff8e
font_02_sfnt_off00010860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df