Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1133ef3cc32a75…

MALICIOUS

PDF

185.7 KB Created: 2015-08-08 09:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cc1c2b038b7185943f3149b0d2a18cc0 SHA-1: 0ab85448d9553afc0d0d42389013dbf1f9ea94b6 SHA-256: 8d1133ef3cc32a75d6a58ba498c11bc743df97cf2601fbacddaae872b41d2008
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 points to botcraftman.ru, which is associated with malicious redirects. No scripts were extracted, but the presence of a malicious link suggests the document's purpose is to lure the user to a harmful site.

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%B5%D0%BA%D1%80%D0%B5%D1%82%D0%BD%D1%8B%D0%B5+%D0%BF%D0%BE%D1%80%D1%83%D1%87%D0%B5%D0%BD%D0%B8%D1%8F+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383926_gyugo_otverzhennuye_audiokniga.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384827_skachat_shrift_arial_mt.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384629_yepu_71_sm.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002447a.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2447A 3556 bytes
font_01_sfnt_off000251fd.bin
ba0d2f140827bc40ad7ceeef776e01ca82cb20c8b39272f9042e694df789f252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x251FD 14636 bytes
font_02_sfnt_off00027f9f.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F9F 14468 bytes
font_03_sfnt_off0002aa51.bin
8837f6f4a205066dc8117302747d34d159e5b0977323fe2e9fe947f7c80b5b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA51 6556 bytes
font_04_sfnt_off0002bd01.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD01 6084 bytes
font_05_sfnt_off0002cc96.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC96 3752 bytes

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