Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfc43b3ea380b31…

MALICIOUS

PDF

183.4 KB Created: 2015-08-08 11:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: aead22329e98d5b28b5c6416c1404054 SHA-1: 98e430d8b88f757dada0e52d00648a15bf6906f0 SHA-256: cbfc43b3ea380b31e3ad18f0a2b3e005b21a54e5708995070c807b9895808ba4
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, 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 embedded URL is sufficient evidence for 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=directx+11+windows+8&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384665_super_bonus_224215_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385352_trudovoy_dogovor_s_montazhnikom_obrazec.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386715_spravochnik_heyla.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a169.bin
9bacc99cac1ae75330ad81d3be381131611da4d8fb405aa20f86c8e406d0cd99		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A169 6448 bytes
font_00_sfnt_off00023ad1.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23AD1 3556 bytes
font_01_sfnt_off00024854.bin
dc4a96979a43f067c5f74e5f5740bcc585d3bca958721afdc10ab15d47d50017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24854 14488 bytes
font_02_sfnt_off0002757e.bin
052808bce8da9aa38873db379ecb8c729c3c0ced61f1c5256c4ba91a635b6564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2757E 14852 bytes
font_04_sfnt_off0002b3bf.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3BF 6084 bytes
font_05_sfnt_off0002c354.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C354 3752 bytes

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