Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1279b58816b4f7…

MALICIOUS

PDF

188.9 KB Created: 2015-07-26 19:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2d3e40610e21bc68913855dd0f873cfe SHA-1: 6794d63047847f93e4f463a1338c9e53a50ac2a3 SHA-256: 9a1279b58816b4f730986c6b7d84bbb450bf8227cd1489bcf6b1738310f19e55
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 likely part of a phishing campaign. The URL itself suggests a lure for downloading torrents. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded URL is sufficient evidence for the attack pattern.

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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+torrent+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+2015+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%8F%D0%B7%D1%8B%D0%BA%D0%B5+%D0%B4%D0%BB%D1%8F+windows+7&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189757_kontrolnaya_rabota_po_literature_9_klass_literatura_18_veka.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4207/4207555_zayavlenie_o_sohranenii_registracionnuyh_znakov.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4214/4214493_skachat_igru_taym_shift_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002b0f3.bin
bbf3158952dfd294a688fb525a2a0f447b51286b8de4a2762c8f319f6f4c81ff		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B0F3 8268 bytes
font_00_sfnt_off000249c3.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249C3 3556 bytes
font_01_sfnt_off00025746.bin
f13f162cea796a8657b7ad03ef605889754629c5397b54d18dba15d9dad19656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25746 14592 bytes
font_02_sfnt_off000284f3.bin
77c9ad3fadf894ce47b83396d013f0bdeeb4bc8bdb432dfb2e9ded5c984c3110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x284F3 14872 bytes
font_04_sfnt_off0002c9c4.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9C4 6084 bytes
font_05_sfnt_off0002d959.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D959 3752 bytes

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