Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bf8820b7b08445…

MALICIOUS

PDF

356.9 KB Created: 2015-08-27 09:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 2355bd87f8b42915fcba547ddf256e34 SHA-1: 5338557b11a705937ee58c6e6c5bf1a2486b5538 SHA-256: 26bf8820b7b0844537007e5506d3574775c82a40635bf1088ebe911826e7d5c6
92 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically due to an embedded link pointing to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The primary attack vector appears to be luring the user to click on the malicious URL, which is likely part of a phishing or malware distribution chain.

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=igo+primo+9+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%B0%D0%B2%D0%B8%D0%B3%D0%B0%D1%82%D0%BE%D1%80%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771776_skachat__besplatno__masha_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771769_mescheryakova__angliyskiy__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771777_poliglot__italyanskiy__za_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005472b.bin
918b29b44fe8cba8b9c727ff0b8373b0a6db34f58c2a6c80ae254894046e5bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5472B 9812 bytes
font_01_sfnt_off00056259.bin
0a1d84d9da4de2492c236656a51643c75de7223fa1db7b16f8da0aa4b5f2746c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56259 16136 bytes

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