Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39d8a94d87ad1bd…

MALICIOUS

PDF

184.9 KB Created: 2015-08-05 15:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 29c12bc36d2ea52977f1050e43be72b1 SHA-1: 5ea1e2ecdfb26626d200750917d488e630e48c44 SHA-256: d39d8a94d87ad1bdb144dc179bf66bcb984397eb0fff483a53d32366bbce5755
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious URL, which is likely used to lure the user to a harmful destination. 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=%D0%BD%D0%BE%D0%B2%D1%8B%D0%B9+%D0%B0%D0%BB%D1%8C%D0%B1%D0%BE%D0%BC+linkin+park+2014+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304513_6_kadrov_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305703_skriptonit_vbvvctnd_tekst.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305788_tanki_onlayn_invaytuy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023e49.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E49 3556 bytes
font_01_sfnt_off00024bcc.bin
45e0a02c6cf7850d93780719d62fbe31c43d8dae919f09610b02093a87d9d0cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24BCC 14784 bytes
font_02_sfnt_off00027971.bin
c0283aab07a19634fcf2f73c0b782ebb7c35efca0e91d98e3288e77d8939392c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27971 14468 bytes
font_03_sfnt_off0002a425.bin
c1b7e55002ef086bd8208bfc5805cbf328fee2b6bd4534a3a9930f79ccaa9809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A425 7424 bytes
font_04_sfnt_off0002b9f8.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B9F8 6084 bytes
font_05_sfnt_off0002c98d.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C98D 3752 bytes

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