Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b37c5d6b4ffd7a…

MALICIOUS

PDF

187.7 KB Created: 2015-07-23 20:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: fda488a2ac8b637a580e8f3f3349d149 SHA-1: ae05e7128f61cefb113abe48238fb71080e03767 SHA-256: c1b37c5d6b4ffd7a93919d9eb6fc15aca3917a285fc9428567389ef86418d5b8
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a critical heuristic for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of compromise, likely serving as a lure to a phishing or malware distribution page. No scripts were extracted, limiting further analysis of the delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%D0%9E%D1%82%D0%B2%D0%B5%D1%82%D1%8B+%D0%BD%D0%B0+%D0%B1%D0%B8%D0%BB%D0%B5%D1%82%D1%8B+%D0%BF%D0%BE+%D0%BF%D1%80%D0%BE%D0%BC%D1%8B%D1%88%D0%BB%D0%B5%D0%BD%D0%BD%D0%BE%D0%B9+%D0%B1%D0%B5%D0%B7%D0%BE%D0%BF%D0%B0%D1%81%D0%BD%D0%BE%D1%81%D1%82%D0%B8+%D1%80%D0%BE%D1%81%D1%82%D0%B5%D1%85%D0%BD%D0%B0%D0%B4%D0%B7%D0%BE%D1%80&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184456_gdz_po_obschestvoznaniyu_6_klass_bogolyubova_ivanova.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184486_skachat_gta_san_andreas_bez_modov_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184520_velikolepnuyy_vek_5_sezon_skachat_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000249e1.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249E1 3556 bytes
font_01_sfnt_off00025764.bin
a37205adf0bf8df66dc53a31cd3d69df435a5e30332b76b97ef1512764eeb6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25764 15000 bytes
font_02_sfnt_off000285b5.bin
0f7bc22695fadd882892007ec8488a83ded268ae5d2e13a25cd9b8d85fda3be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x285B5 14588 bytes
font_03_sfnt_off0002b0c6.bin
d74ec959fe26b3a8592dbc871832c9c48243e1d92912bb600d074f9a1efbf9a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0C6 7004 bytes
font_04_sfnt_off0002c505.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C505 6084 bytes
font_05_sfnt_off0002d49a.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D49A 3752 bytes

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