Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2deaa30b6aecf72…

MALICIOUS

PDF

187.1 KB Created: 2015-07-23 21:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a35b833dafbf7fee6c57f4b5124ffb44 SHA-1: 54e59b623c1370a011bc8f2aa8f76553fe7e4e97 SHA-256: a2deaa30b6aecf72f4f27d52d9ffbda0f2475e22af5fc890ddc4977f77e1db54
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 flagged this PDF with high confidence. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting a malicious intent.

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=%D0%BA%D0%BE%D0%B4+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D0%B8+%D0%B4%D0%BB%D1%8F+kaspersky+internet+security+2015+%D0%BD%D0%B0+365+%D0%B4%D0%BD%D0%B5%D0%B9&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184794_osnovuy_reanimatologii_zaryanskaya_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184301_skachat_igru_the_incredible_hulk_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184636_kod_na_tank_v_gta_5.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002aa7e.bin
ac9a23db879ccae8ee4a9a544071ddc7cff9562258028527f34fda4ffe07e29b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AA7E 8124 bytes
font_00_sfnt_off0002436d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2436D 3556 bytes
font_01_sfnt_off000250f0.bin
8a79b01ecf6f7400d5dea916d07334bf45046bf73bb6ca842b701a8691303f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x250F0 14944 bytes
font_02_sfnt_off00027ef3.bin
ee8203e3dc7b9418b9a7905b8709550e0936ce64f6a44add6796333ffb0dbd1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27EF3 14756 bytes
font_04_sfnt_off0002c2ac.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2AC 6084 bytes
font_05_sfnt_off0002d241.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D241 3752 bytes

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