Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44344e0f882e884…

MALICIOUS

PDF

185.4 KB Created: 2015-07-23 20:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 3160261867f59949d27c25b4dd7bfe64 SHA-1: 1e60b18d5e89459a13c0764294ed31d6135928b9 SHA-256: e44344e0f882e8842b957f3cc247730d2b470fd79b7044a8edec847b1278a8fd
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, botcraftman.ru, which is flagged by heuristics. The ML classifier also strongly indicates maliciousness. The embedded URL is designed to look like a search result for software, likely to trick users into clicking. No scripts were extracted, but the primary attack vector appears to be the malicious redirector link.

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=avid+media+composer+%D1%83%D1%80%D0%BE%D0%BA%D0%B8+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184608_klyuch_dlya_windows_7_domashnyaya_bazovaya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184554_sims_3_polnaya_antologiya_19_v_1_skachat_torrent_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184487_skachat_chituy_na_tanki_onlayn_na_kristalluy_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a749.bin
1fc3597555481be7a14fcb565093b23abae910e92516aeb2691e9ed4c7924c5e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A749 7120 bytes
font_00_sfnt_off0002402a.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2402A 3556 bytes
font_01_sfnt_off00024dad.bin
5f04fe3990b508be8563343d1e9785c1241abe286c123f684f99bc4bcb8b00d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24DAD 14912 bytes
font_02_sfnt_off00027bf0.bin
7d518e1ab50cf84178a4074bb661fc348b1d7d224a02d4bd872f0fa431883a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BF0 14684 bytes
font_04_sfnt_off0002bbeb.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBEB 6084 bytes
font_05_sfnt_off0002cb80.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB80 3752 bytes

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