Malicious PDF — malware analysis report

Static analysis result for SHA-256 494cfcf3df3a4e35…

MALICIOUS

PDF

184.3 KB Created: 2015-07-23 20:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c6c760a4dccb001d47a6486bbdd56291 SHA-1: cebbdbb4ddefb74df603c817389e0865df9b4dbd SHA-256: 494cfcf3df3a4e351ee5744c88c2e3a796424c70b86189b58e0b6ce9ed5d7958
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 infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for the attack pattern.

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=Android+system+recovery+3e+%D0%B8%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183185_lada_kalina_shema_yelektricheskaya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184287_shpargalki_po_algebre_egye_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184502_molodezhka_1_sezon_skachat_torrent_v_horoshem_kachestve.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a2c6.bin
a91abefa5049467fe919e72554482894349c7e51fe7113dad42f40e2fa30ee74		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A2C6 7096 bytes
font_00_sfnt_off00023ccb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23CCB 3556 bytes
font_01_sfnt_off00024a4e.bin
2501e4d19677f1320e3a4cc5d91285642ffa1c1412f2fcad9062ae0d618d81d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A4E 14204 bytes
font_02_sfnt_off00027714.bin
e8680fa7f5e28d09e62d84b11cb137a5224f056350a3814e3558cbd385818dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27714 14792 bytes
font_04_sfnt_off0002b764.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B764 6084 bytes
font_05_sfnt_off0002c6f9.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6F9 3752 bytes

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