Malicious PDF — malware analysis report

Static analysis result for SHA-256 7914c0fdc84d7c8a…

MALICIOUS

PDF

184.0 KB Created: 2015-08-05 22:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 3264f202ebfad8de929789d01c0be3d8 SHA-1: 34890d58f80ccfcc694526c11f7b07e0a1d050c6 SHA-256: 7914c0fdc84d7c8a91491efd3c01081559966a98ee12984caf37238b13b06659
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious due to an embedded link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The link likely serves as a lure to a phishing site or to download a second-stage payload. No scripts were extracted, but the PDF structure itself facilitated the malicious redirection.

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=the+creeps+%D0%BF%D1%80%D0%BE%D1%85%D0%BE%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4307/4307092_skachat_drayvera_na_hp_deskjet_f2180.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305949_tekst_pesni_edinaya_rossiya.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305313_skachat_sexy_beach_3.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_off0002a397.bin
40e2049331fd78dda03ff7731ec605de1e0599c1194d82ab9670332299d96e70		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A397 6548 bytes
font_00_sfnt_off00023c23.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C23 3556 bytes
font_01_sfnt_off000249a6.bin
df58e57a033a4f6a6eae1effc238898104ccd1a1bdbb409a631b866e605aa298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249A6 15276 bytes
font_02_sfnt_off00027887.bin
0556a96708f3cc8795ec9899e1bb1894707090d0eb9498d33aad2b8cfc6c3421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27887 14632 bytes
font_04_sfnt_off0002b62e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B62E 6084 bytes
font_05_sfnt_off0002c5c3.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5C3 3752 bytes

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