Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bf3fd884c43d2b…

MALICIOUS

PDF

78.1 KB Created: 2021-02-24 18:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d315f633b4aed2e1d4b23fa2e55ee904 SHA-1: 0ff103260296c5d1501a3d8c960614cee2c95d59 SHA-256: c3bf3fd884c43d2b3ba912a572733dc664e02060f123d4169648bcf648e20ef3
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'https://bologen.ru/award?keyword=the+story+of+white+fang+1982', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'The story of white fang 1982'. No scripts were extracted, but the PDF structure and embedded URI indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=the+story+of+white+fang+1982 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388421/normal_60173a750adca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fe56d89508e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_5fd330edb7f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_601916ab425ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff018880503b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_600aec8a93143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_6007cb346716c.pdfIn PDF document text
    • http://volewug.iblogger.org/52360786382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418747/normal_6035d33a38ff4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456660/normal_5feeeeb8714cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_6029715de9077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6015e6348711b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bofametif.rf.gd/97360855897.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_off0000f58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58F 5676 bytes
SHA-256: c615a8ea50854ec271b5879da523c3af8487875fc5e7fa78c600f6e44da46d89
font_01_sfnt_off000108f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F6 10140 bytes
SHA-256: 493762531364d726952931d89524a79ec9d1e44c7cb51f10475925e8b9742390