Malicious PDF — malware analysis report

Static analysis result for SHA-256 863863fae07c1f3c…

MALICIOUS

PDF

186.5 KB Created: 2015-08-08 10:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a9e1b7506fc676e03d4cd2d3d40185bd SHA-1: 198d6f76fb2e1099954ba66beb7bac95c1d2cdb7 SHA-256: 863863fae07c1f3c5004fbb16cd1c6b38de49595e9f929b8dabd667c11dafa4e
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 deliver malware. The document body, though heavily obfuscated, suggests it is a lure for software downloads. No scripts were extracted, but the presence of a malicious URL and the ML classifier's high confidence indicate a malicious intent.

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=surgeon+simulator+2015+full+version+%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&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384376_ee_zvali_nikita_3_sezon_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384063_skachat_besplatno_film_karusel.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4241/4241214_biletuy_po_biologii_9_klass_s_otvetami_2015_god.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a8ec.bin
157f02b07c7d58eac5633a07bb07b292b6c7c96a73acb54a7a9b7a74dce07df6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A8EC 7900 bytes
font_00_sfnt_off0002410f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2410F 3556 bytes
font_01_sfnt_off00024e92.bin
91a9b95b0cf6972aadd4a5a606b16dabdbcc0d5d9028e364e66d5eb639b3eec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E92 14564 bytes
font_02_sfnt_off00027bb7.bin
1a0cda8491d36bf63173724433c3d2ac0b13b1a08096c7dbdc5f77eae28281f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BB7 15284 bytes
font_04_sfnt_off0002c05a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C05A 6084 bytes
font_05_sfnt_off0002cfef.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFEF 3752 bytes

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