Malicious PDF — malware analysis report

Static analysis result for SHA-256 52cc0b8d9931792a…

MALICIOUS

PDF

375.2 KB Created: 2015-08-29 01:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a661a2d42abdc0e3b77b3297c2cb7bb6 SHA-1: e874b31febba7bdd207b9f0f93d643a78cb73ac5 SHA-256: 52cc0b8d9931792a232e10b14ac951dc7880e363bd00fb004a617ae034c6c448
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is associated with malicious redirectors. No scripts were extracted, but the primary attack vector appears to be luring the user to a malicious site via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B+%D0%B4%D0%BB%D1%8F+nokia+6303i+classic+%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//4817/4817556_programma__adobe__premiere_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817917_zvuki__volshebstva__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818387_skachat__igru__rainbow_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005917e.bin
8b235ee23f5e1fd4db1ef013bb4318636205b4aa16e78394d3c6742a90f853b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5917E 9508 bytes
font_01_sfnt_off0005abe8.bin
a09b3eff709510b62d03f961b5d513b540eed5468dc5acdbd25a7b76d26e481d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABE8 16352 bytes

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