Malicious PDF — malware analysis report

Static analysis result for SHA-256 610a5ba3bfc460bf…

MALICIOUS

PDF

182.8 KB Created: 2015-07-24 09:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9134cd648244dc55eaf428a0aac0c317 SHA-1: 30f272f0956f3ab1347e77126ae3cbe13b17a42d SHA-256: 610a5ba3bfc460bf7d979b63c4e2c26518411405916202479fbc4768dfa1ca60
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious due to an embedded link pointing to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The primary IOC is the malicious URL, which is likely used to direct users to a compromised 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=Ozbekcha+seqs+selka+olish+kilib&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186536_fizika_8_klass_peruyshkin_uchebnik_chitat.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185041_fritz_12_na_russkom_yazuyke_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190118_razbor_zadaniy_egye_po_fizike_2015.pdf
    • http://www.microsoft.com/typography/fonts/You
    • http://www.microsoft.com/typography/fonts/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off00029f77.bin
1747246660afa9ff5dfd5938dbbedfb2b212eba68165e61843fbf9bd22eba44e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29F77 6360 bytes
font_00_sfnt_off000238eb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x238EB 3556 bytes
font_01_sfnt_off0002466e.bin
f85fb7772dfe66196ee5ce31e75ae6c0e458d1837ec651c4ba5d66de451fb992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2466E 14724 bytes
font_02_sfnt_off000273c1.bin
14204e6e3ab85898407bfa048eaa7cfc05dafa742b4bae7c88896373ebb93881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x273C1 15060 bytes
font_04_sfnt_off0002b17f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B17F 6084 bytes
font_05_sfnt_off0002c114.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C114 3752 bytes

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