Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08ec453240b1a18…

MALICIOUS

PDF

378.9 KB Created: 2015-08-27 09:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b6c098d92528366c13058de952d2505d SHA-1: a16c94e37ae3dacd46d6126109541b46b2b59714 SHA-256: e08ec453240b1a184e4d516f4ec15e67636c9a4b619184db579992ceed525a13
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of compromise. No scripts were extracted, and the document body was unreadable, but the presence of the malicious URL is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 http://botcraftman.ru/?lip&keyword=%D0%B3%D0%B0%D1%80%D1%80%D0%B8+%D0%BF%D0%BE%D1%82%D1%82%D0%B5%D1%80+1-8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771846_heroes__of__might_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771987_dolzhnostnaya__instrukciya__yekonomista_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771953_skachat__video__yeroticheskiy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005a27f.bin
9cc8e19839d530fa6193378b19381a0460c08035793a38330bcf8e17ccf34342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27F 6920 bytes
font_01_sfnt_off0005b683.bin
5a763c55c401e7772c0c976e5a40d1eab865d3031a0209c39bdf3bf042053478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B683 17480 bytes

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