Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5f4a6722116dcc…

MALICIOUS

PDF

185.4 KB Created: 2015-08-08 09:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9fe80118b65a780f69b9c3e2a0c87b9d SHA-1: 49f38ecdc5ccbf1332892ca5a39eebe084303ea6 SHA-256: cd5f4a6722116dcc0014057b1fa2f34d32c4980d60c4842c98e1b8d65415dee4
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/, is the primary indicator of malicious intent, likely serving as a gateway to a phishing or malware distribution page. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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%80%D0%B0%D0%B7%D0%B4%D0%B0%D1%82%D1%8C+wifi+%D1%81+%D0%BD%D0%BE%D1%83%D1%82%D0%B1%D1%83%D0%BA%D0%B0+windows+vista&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384266_insanity_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384270_spravka_zainteresovannosti_v_sdelke_ne_imeetsya_ooo_obrazec.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384354_vika_cuyganova_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a6cb.bin
a11f9e71cebff4c6624f95475299a96421d55d613f9185a2de2fbbc6bd17653e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A6CB 7244 bytes
font_00_sfnt_off00023f59.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F59 3556 bytes
font_01_sfnt_off00024cdc.bin
1cc6883c6a4ef91ffcd949576f21c0c84d9e0517183e120c5454ce028ff261f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CDC 14784 bytes
font_02_sfnt_off00027af4.bin
d1ab5ad1b31a775b3ce0777ef6617e0e6166a754204fceda6842bd3620a78753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27AF4 14800 bytes
font_04_sfnt_off0002bbff.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBFF 6084 bytes
font_05_sfnt_off0002cb94.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB94 3752 bytes

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