Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9422f3d03fc3ef…

MALICIOUS

PDF

188.4 KB Created: 2015-07-24 13:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b218dd0815b243ef215a15f4e3d73bd5 SHA-1: 732cdc70c2cc8fc11d483924c87f0424d3e1b47a SHA-256: 3b9422f3d03fc3efc195ad1e5881358d63d8484225bfd63a4d25105178a38520
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/..., is the primary indicator of compromise. No scripts were extracted, and the document body was truncated and unreadable, preventing further analysis of the delivery mechanism.

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%80%D1%8D%D0%BF+%D1%82%D0%B5%D0%BA%D1%81%D1%82%D0%B0+%D0%BF%D1%80%D0%BE+%D0%BB%D1%8E%D0%B1%D0%BE%D0%B2%D1%8C+%D0%BD%D0%B5%D0%B8%D0%B7%D0%B2%D0%B5%D1%81%D1%82%D0%BD%D1%8B%D1%85+%D0%B8%D1%81%D0%BF%D0%BE%D0%BB%D0%BD%D0%B8%D1%82%D0%B5%D0%BB%D0%B5%D0%B9&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191636_skachat_antivirus_dlya_windows_phone_8.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185291_skachat_vay_fay_na_kompyuter_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184673_zdravstvuyte_slova_i_muzuyka_m_kartushinoy_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024c30.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C30 3556 bytes
font_01_sfnt_off000259b3.bin
963f86566c980e5848dc891b402d843d6fb8d878fb8fc8e54037a42bb6861cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x259B3 14944 bytes
font_02_sfnt_off00028852.bin
a87e019b28f450147ba69672fff581a7ffeaa80a480186685bf129788d490e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28852 14532 bytes
font_03_sfnt_off0002b341.bin
3296dd214c9a17ad914eb724554e32832d4794d9d90561bee1a9cb2029e84b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B341 7168 bytes
font_04_sfnt_off0002c7fd.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7FD 6084 bytes
font_05_sfnt_off0002d792.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D792 3752 bytes

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