Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e8f385dd34a08c…

MALICIOUS

PDF

183.8 KB Created: 2015-08-05 13:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a878468e691977147d8a2174892509d3 SHA-1: 836dc0151db0bd6ec0c5ee99aeaff41a4dfe002c SHA-256: b6e8f385dd34a08c8b30a6429c1d571e4915ef7133f735dd5025711f5d947b7f
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 primary IOC is the malicious URL, which is likely used to direct the user to a site hosting malware or engaging in phishing. No scripts were extracted, and the document body was not sufficiently readable to infer 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%B8%D0%B3%D1%80%D0%B0%D1%82%D1%8C+%D1%81%D0%B8%D0%BC%D1%81+4+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304540_yuriy_sigov_singapur_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304507_programma_dostupnoe_zhile_moloduym_semyam.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304476_titulnuyy_list_po_chercheniyu_a4.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023dfb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23DFB 3556 bytes
font_01_sfnt_off00024b7e.bin
4710e9c53ffed445106b4ed1676d5e733cf1396e4ad8557cbc8da859ed89f0d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B7E 14344 bytes
font_02_sfnt_off0002789d.bin
b25a878c38df03084b80507fde4ae109db85ec44b7dc37b32731de4875b7e8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2789D 14468 bytes
font_03_sfnt_off0002a352.bin
5b7091714e8b1ac665b0a938eb18373641ed102a515caeb818ca7d338a28c183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A352 6428 bytes
font_04_sfnt_off0002b58a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B58A 6084 bytes
font_05_sfnt_off0002c51f.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C51F 3752 bytes

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