Malicious PDF — malware analysis report

Static analysis result for SHA-256 731f444e9eb29f50…

MALICIOUS

PDF

185.3 KB Created: 2015-07-27 08:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 20744f22a9a702cb85ee46efa53f4efc SHA-1: cd154a3193f41f1c79564533e9b68b25654ae90d SHA-256: 731f444e9eb29f503097e815a9b3e562918b4aaba21f5c62d0ac42cdf953e6b4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, advertised as a download for cracked software. This indicates a phishing or social engineering attack aimed at tricking users into visiting a potentially harmful site. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=windows+xp+sp2+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+32+bit&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4220/4220582_the_last_of_us_na_pc_skachat_torrent_s_russkoy_ozvuchkoy.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193115_half_life_1_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4199/4199278_dont_strave_skachat_torrent_2015_rus.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_off0002a62b.bin
94c66aaac0d6855d4fe151451abe56c858e3663dbd9fda84f7d7825285523fd9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A62B 7244 bytes
font_00_sfnt_off00023e01.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E01 3556 bytes
font_01_sfnt_off00024b84.bin
b2930c754fe191f43ec53801ef28d6a15d8035f0e035c781d7ac5946a90b2a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B84 15216 bytes
font_02_sfnt_off00027a48.bin
dd114a035b4f5e8adbb2aa77c3b8bfb9e8c470d68aabd9eebf85d07e9af3dacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27A48 14848 bytes
font_04_sfnt_off0002bb4f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB4F 6084 bytes
font_05_sfnt_off0002cae4.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAE4 3752 bytes

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