Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b77e92d801ee3b…

MALICIOUS

PDF

355.8 KB Created: 2015-08-27 23:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ba71a845f6b69f814c0259fb17659547 SHA-1: 53eee938589d6bc483494ae2ee7fe723b01a19b0 SHA-256: 85b77e92d801ee3b5d4b2603d7cc4f3f9fb4ea7d5654ad46e5485ef0eb1059fe
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is indicative of a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily truncated and unreadable, preventing further analysis of the specific lure.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D1%80%D0%BE%D0%B5%D0%BA%D1%82+%D0%B1%D0%B5%D1%81%D0%B5%D0%B4%D0%BA%D0%B8+%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//4787/4787859_triagrutrika__bazirovanie__albom_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788053_skachat__programmuy__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787861_raspisanie__avtobusa__10_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054de5.bin
b7ef1a257db44c788ae1d81a631a43f1e7ddfa941da4f7f5493d76ce3133c00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DE5 7624 bytes
font_01_sfnt_off00056423.bin
580eb98b8c68c283e147dc98146969fb4ab73c1a24880049534a3d2231bf2fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56423 13532 bytes

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