Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3127e9543ad47da…

MALICIOUS

PDF

184.1 KB Created: 2015-07-23 20:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9891838a42b1bfe7aafb220eda495ff5 SHA-1: 755dd52c33322449392a2bacf2633757e868e99a SHA-256: a3127e9543ad47da275c09f16c436209b9fb569609288cb638dc82fd0eb13833
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 strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was heavily truncated and unreadable.

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%9F%D0%BB%D0%B0%D0%BD%D1%88%D0%B5%D1%82+eplutus+g10s+%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//4183/4183252_proekt_doma_yelbrus.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184288_luchshie_boi_mayka_taysona_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183259_primer_rascheta_strahovuyh_vznosov_2013.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a1dd.bin
ece5c37e1c6614a895727ce0dfb9dabd2b272376dfb31ee3be170dc10b469539		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A1DD 7160 bytes
font_00_sfnt_off00023c49.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C49 3556 bytes
font_01_sfnt_off000249cc.bin
5eaa48ff9c964a0aad7d6a8a7f02d971f700e05b9c774089b45dc664fe7faf4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249CC 14308 bytes
font_02_sfnt_off000276ad.bin
f5181c9d6296362e67c239718565aa2ab243e3c83f650ef7b7c45ecc7ab7e46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x276AD 14636 bytes
font_04_sfnt_off0002b6c9.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6C9 6084 bytes
font_05_sfnt_off0002c65e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C65E 3752 bytes

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