Malicious PDF — malware analysis report

Static analysis result for SHA-256 81fbc67202b3dd16…

MALICIOUS

PDF

334.3 KB Created: 2015-08-24 02:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b947caa37080d01b1fb76c6b7878309e SHA-1: e376033b07b89f4fc4ea2cfcec20e8ecc44c52a5 SHA-256: 81fbc67202b3dd162de23dfa7a2274957773b6003df3bf7cf45e38cea2215c5b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'botcraftman.ru'. Although no scripts were extracted, the presence of this malicious URL suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting. The document body's obfuscated nature and the PDF structure itself do not provide further actionable intelligence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+lenovo+launcher&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694935_avtobus__malaya__vishera_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4696/4696226_otsutstvuet__fayl__bazuy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694714_split__second__kryak_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004f400.bin
790929700ba3b751775f652396044ac1afaa54de9365050ea9abc617ca1375a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F400 8116 bytes
font_01_sfnt_off00050a5c.bin
10446d68262598f24e18fb7c5e6f9f28c7fbcd7fded81296f37aa577e0eeb6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A5C 15748 bytes

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