Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76f783dc7a3c20d…

MALICIOUS

PDF

183.4 KB Created: 2015-07-23 20:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f37ff039cb7e641d855d4fc671cf5862 SHA-1: 8ca0eefffba481cb2a113c73564dc3989211c90a SHA-256: a76f783dc7a3c20d564e8c23c8ef389eea54847d7cbf67e911c5e514e2384de6
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/?lip&keyword=%D0%9C%D1%82%D1%81+970h+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80&charset=utf-8 is the primary indicator of compromise. The document body was not sufficiently readable to determine a 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=%D0%9C%D1%82%D1%81+970h+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184441_bumer_notuy_na_bayan.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184375_pasportnuyy_stol_yurga_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184349_fb2_knigi_skachat_besplatno_bez_registracii.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023926.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23926 3556 bytes
font_01_sfnt_off000246a9.bin
ac439e8589e469e29c319cbbd64ecfb1c1b4740dc336ab7b1ada0dd444659819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x246A9 15376 bytes
font_02_sfnt_off00027693.bin
f4f0085b7e4a554663dcecc44e1936fbb33811f4f2ed78a348830893180d9fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27693 14612 bytes
font_03_sfnt_off0002a19e.bin
0eb9ae3adc82b99d85b45e7e9266b613108b4c22a3167a1cb9d0d13a30a84f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A19E 6372 bytes
font_04_sfnt_off0002b3bd.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3BD 6084 bytes
font_05_sfnt_off0002c352.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C352 3752 bytes

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