Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca24d95463a88b7…

MALICIOUS

PDF

385.7 KB Created: 2015-08-24 00:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a2fa1d44f2e7ec42f8616800a7e7e420 SHA-1: d0157b24d000c77c0b2ec9fae9ec63f60df684fb SHA-256: 6ca24d95463a88b78f3898aa10e5de2f0da87c1d95576d95f6c09eab97d51268
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This heuristic, combined with a high ML classifier score, strongly suggests malicious intent. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient evidence for the attack pattern. No scripts were extracted, but the primary threat is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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%B4%D1%8D%D0%BD+%D0%B1%D1%80%D0%B0%D1%83%D0%BD+%D1%82%D0%BE%D1%87%D0%BA%D0%B0+%D0%BE%D0%B1%D0%BC%D0%B0%D0%BD%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+fb2&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693050_raspisanie__22__marshruta_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693088_mirovoe__soglashenie__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693602_skachat__mangu__apelsinovuyy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005c046.bin
55d9f3d1b12a37503713be3b559e445d641eaeaf51638a95a2bc9935c72cb2c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C046 8416 bytes
font_01_sfnt_off0005d8c9.bin
e9d9f03ad6a41100000727d55fc44626abe56bdca812983be0f6cb1c81a8dc42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8C9 14616 bytes

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