Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9f6ddf1c8beba3…

MALICIOUS

PDF

184.5 KB Created: 2015-07-24 11:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f41487d0cfa2faef4278325506c4eac5 SHA-1: bb1ee8bf3d6e2bbd3a5bc83b43afb7fad3033fad SHA-256: 4a9f6ddf1c8beba3e4ecd3ea208322336c3d64130663c5a06563f1fa5ccc045d
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 confirmed as malicious and likely serves as the initial stage for a phishing or malware delivery attack. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=%D1%81%D1%82%D0%B5%D0%BF%D0%BC%D0%B0%D0%BD%D0%B8%D1%8F+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192022_voyna_prestolov_4_sezon_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190110_skachat_muzuyku_besplatno_i_bez_registracii_diskoteka_80_90.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191492_primeruy_rascheta_staticheski_neopredelimuyh_balok.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023f46.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F46 3556 bytes
font_01_sfnt_off00024cc9.bin
6d6af23a4a3c5fa7047e9acfd6e9f9df28deae5eec0b2d56a806ddd7de249e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CC9 14648 bytes
font_02_sfnt_off00027abc.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27ABC 14468 bytes
font_03_sfnt_off0002a56e.bin
a2efc987c636f5a9547d0781b6e08e232c56a7dcb5533e75eec00be442d73af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A56E 6544 bytes
font_04_sfnt_off0002b81d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B81D 6084 bytes
font_05_sfnt_off0002c7b2.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7B2 3752 bytes

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