Malicious PDF — malware analysis report

Static analysis result for SHA-256 a403aff1ba55781a…

MALICIOUS

PDF

354.4 KB Created: 2015-08-28 03:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d042ebff350a9dbf1b4ff563fa7f1613 SHA-1: 90578c38786b9fe8c71f8677c1c8a072d50bb22a SHA-256: a403aff1ba55781aba6a8b08b7f6614d540e1c65cc005b628cf3f7f7df472b77
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to botcraftman.ru, which is flagged as malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, suggesting it's not intended for user interaction but rather to host the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%BA%D0%B0%D0%BA+%D1%81%D0%B1%D1%80%D0%BE%D1%81%D0%B8%D1%82%D1%8C+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D1%8E+windows+8&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788470_world__of__tanks_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4791/4791509_skachat__vuypusknoy__2014_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4790/4790078_samuyy__luchshiy__mod_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005417c.bin
26c41c868d9b7993d4cc1dc6746d14cd98422c299593e7dc3fb422ba1086ae5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5417C 9040 bytes
font_01_sfnt_off00055b72.bin
d6433054b78a4c9250a3caee854db4ca596dd88bf4f214c9c5476185aec0c9a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B72 14872 bytes

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