Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b50930caa775de…

MALICIOUS

PDF

187.6 KB Created: 2015-07-25 12:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 0ef1d0a550a611211c08ed164f8c2708 SHA-1: 9cb3463ec37f464aa693dcd43f048b1b06650691 SHA-256: 51b50930caa775defb635c9cebe2ec6975e717bd645512c01b9745c1bb4f5232
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, and the document body was truncated, limiting 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=%D0%BE%D1%82%D1%87%D0%B5%D1%82+%D0%BE+%D1%84%D0%B8%D0%BD%D0%B0%D0%BD%D1%81%D0%BE%D0%B2%D1%8B%D1%85+%D1%80%D0%B5%D0%B7%D1%83%D0%BB%D1%8C%D1%82%D0%B0%D1%82%D0%B0%D1%85+%D0%B1%D0%BB%D0%B0%D0%BD%D0%BA+2014+%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://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4195/4195373_skachat_papku_gamedata_dlya_stalker_zov_pripyati.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191685_robokalipsis_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4197/4197620_buhgalterskiy_balans_ego_stroenie_i_soderzhanie.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000248d1.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x248D1 3556 bytes
font_01_sfnt_off00025654.bin
47e49ef78bd123723823cd3170d7c4bd0dfa763fd2eae0f438ff66780803f2e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25654 14636 bytes
font_02_sfnt_off000283a8.bin
b2bb0dbfbae87cde675d1fc7fca1009442e52dba23fc48e87f403d1716ad1d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283A8 14532 bytes
font_03_sfnt_off0002ae9c.bin
ec943f24bfc9d7b0a31281556cfada47bf6d58502883c32906a94ed93e7693a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE9C 7480 bytes
font_04_sfnt_off0002c4b6.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4B6 6084 bytes
font_05_sfnt_off0002d44b.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D44B 3752 bytes

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