Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc731423bf625bd…

MALICIOUS

PDF

341.0 KB Created: 2015-08-23 23:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 5b3126211fe434411fe08abef19753d0 SHA-1: 2a787467cc7152f605c06ccffa09c12b40ae3313 SHA-256: 5bc731423bf625bdef01b7097d915883375597b9e95a510f0a7213d23026c2bf
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL suggests an attempt to redirect the user to a compromised site, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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+%D1%81%D1%82%D0%B0%D0%BB%D0%BA%D0%B5%D1%80+%D0%BE%D0%BF+2+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4692/4692969_skachat__ustanovochnik__gta_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4692/4692974_muzuykalnuye__klipuy__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4692/4692972_krasivuyy__skin__devushki_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000508f0.bin
d0dbda45e6dcc6994653b06f52495ec05a4400bb699f56e235a77dd188618b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x508F0 8704 bytes
font_01_sfnt_off00052126.bin
f1a106cd2c00a496829f1637255551cf53a5025861cf1d1e0a1f5875bfc6bb52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52126 16716 bytes

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