Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9cc85831f96055…

MALICIOUS

PDF

183.6 KB Created: 2015-08-05 17:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 38ddf148988060fa01da4142a776dab1 SHA-1: 04cc1025646aba184c3b1e5c32cc1dbfc50b5504 SHA-256: 3a9cc85831f9605583d375b6c723656ca234e9e9dab5438ff289633f11cb431d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is likely intended to lead the user to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine further payload delivery or persistence mechanisms.

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=arcane+legends+%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://img1.liveinternet.ru/images/attach/c/6//4305/4305422_audioknigi_ustinova_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305449_skachat_sims_4_torrent_russkaya_versiya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4306/4306531_shemuy_na_555.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a14a.bin
ea9e05b63984c13f0cb357cd55239366b42fd537114dcda4b3da1b7257279b5b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A14A 6760 bytes
font_00_sfnt_off00023cc0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23CC0 3556 bytes
font_01_sfnt_off00024a43.bin
5d0feae5de78606b280d6a22428dfe2327a90dc5a15a933d0915ff2291bb5e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A43 14360 bytes
font_02_sfnt_off0002769b.bin
7b1b777943793680ea48e8f1ee7b24885826170d960b293e4045bb0a7896a391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2769B 14468 bytes
font_04_sfnt_off0002b4b8.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4B8 6084 bytes
font_05_sfnt_off0002c44d.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C44D 3752 bytes

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