Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3034efad13863c…

MALICIOUS

PDF

348.7 KB Created: 2015-08-27 23:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b3327f498a13ecda21c4c44f074003d5 SHA-1: 9f7f52025f951fc7e537dcf7b1bd9796fdceb7ec SHA-256: 7b3034efad13863cac6a65122e60f23fff02659e89f65d4835ce5db46cdb5a09
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by a machine learning classifier as malicious. It contains an embedded URL pointing to a known malicious redirector, indicating an attempt to lure the user to a harmful website. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

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%80%D0%B0%D1%81%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5+%D0%B0%D0%B2%D1%82%D0%BE%D0%B1%D1%83%D1%81%D0%BE%D0%B2+%D1%81%D0%B0%D1%80%D0%B0%D1%82%D0%BE%D0%B2+%D0%B2%D0%BE%D1%80%D0%BE%D0%BD%D0%B5%D0%B6&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787803_skachat__muzuyku__torrentom_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787872_skyrim__18__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787992_skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052aa9.bin
4236898b3924bb67cf0b3b722d516a46f46b155b79b4d969436011b07f110c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52AA9 7708 bytes
font_01_sfnt_off000540cd.bin
d5df056f1afb3885898e652c40fada4bd9c4c40dacc3f0477e2e685985be81f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540CD 16520 bytes

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