Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e16ba1fcfb88900…

MALICIOUS

PDF

187.9 KB Created: 2015-08-05 13:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e662522f5bdeec5291a481b74d4e0366 SHA-1: bb5de06f4faab2c0b53856c4e7f3e85b9fa95071 SHA-256: 8e16ba1fcfb8890000b0ed264da5f3547ccab98b169256c272d02823fec3b5c6
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a known malicious redirector. No scripts were extracted, but the presence of a malicious link indicates a likely attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8788281-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8788281-0
  • 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=3d+home+architect+design+suite+deluxe+8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304435_skachat_batman_arkham_city_pc_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304449_kamasutra_polnaya_versiya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304439_shablon_lending_peydzh.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ae12.bin
52772591c115c80063af0d9ff6de2d66736c81fcd731a717bf94b67703e60a81		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AE12 7968 bytes
font_00_sfnt_off000245bb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245BB 3556 bytes
font_01_sfnt_off0002533e.bin
894a42524249b784ea0c898d397c3d15fb9f218106781dfc554dfec5d726db33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2533E 15312 bytes
font_02_sfnt_off0002823b.bin
97d7b89619a28a9ceb2e27171706b4416ce1de2b859471b81dc54e5afe1fdbcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2823B 14912 bytes
font_04_sfnt_off0002c5ab.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5AB 6084 bytes
font_05_sfnt_off0002d540.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D540 3752 bytes

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