Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec21833cf00e1a0…

MALICIOUS

PDF

186.4 KB Created: 2015-07-25 19:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: faa57c9ecf065cb2cb5b9ba8a1160e82 SHA-1: b7f4e130085bc7e9ef0f92aac77185e48360b2b3 SHA-256: fec21833cf00e1a0d80e99a686c6437a07885b4d2aa34742add987140e510b45
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 assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware distribution campaign. No scripts were extracted, and the document body was not parsable.

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%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+adobe+illustrator+cs5&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4205/4205223_imax_b6ac_instrukciya_na_russkom_yazuyke.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4202/4202523_avast_kod_aktivacii_2015.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4203/4203550_rabochaya_programma_po_matematike_5_klass_vilenkin_po_fgos_s_uud.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a9ae.bin
cb5300b5a497035bfcd52ecc0d5d31aba312e5a81708f71a3c0ffb1bc77dfcf1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A9AE 7580 bytes
font_00_sfnt_off0002423c.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2423C 3556 bytes
font_01_sfnt_off00024fbf.bin
50d1f72701527eba7d2aafbf45bf5b98163ca7e9c9a6031186cb9813821aaa36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FBF 14904 bytes
font_02_sfnt_off00027db9.bin
fdc484d8aa7d7b77b64555d6cc1c59885c9b4b0e0cbe458b282bd8cf6816af09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27DB9 14884 bytes
font_04_sfnt_off0002bffd.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFFD 6084 bytes
font_05_sfnt_off0002cf92.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF92 3752 bytes

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