Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab866f4fdce13ffb…

MALICIOUS

PDF

187.5 KB Created: 2015-08-05 13:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f89a7a9f08d14e82174f1a429d3aae71 SHA-1: 13c6b652b2d9955ab64e3f079abe620df2a6f665 SHA-256: ab866f4fdce13ffbff492766895237bb02ba2b06f3ee2a97669232dd75b0ae50
90 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary IOC is the malicious URL identified by this rule. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt.

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+hill+climb+racing+%D0%BD%D0%B0+%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1%8E%D1%82%D0%B5%D1%80+%D0%BF%D0%BE%D0%BB%D0%BD%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304626_knigi_formata_txt_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4300/4300234_solidworks_2011_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304560_skachat_virtual_dj_russkaya_versiya_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000244d5.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244D5 3556 bytes
font_01_sfnt_off00025258.bin
0c12d177a4f0b463ed3853a6f94377e0b5eac1989db88e65de54d9025451ae8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25258 15196 bytes
font_02_sfnt_off0002815c.bin
d136cac76d258218189f2d17969d4a65a1c33956a54bc834c5497848358818bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2815C 14864 bytes
font_03_sfnt_off0002ad00.bin
cf60e114d9ddb5c0bdfefa309766c0c5ff63d9dd09f22cdfaeaa02a887584ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD00 7860 bytes
font_04_sfnt_off0002c43a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C43A 6084 bytes
font_05_sfnt_off0002d3cf.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3CF 3752 bytes

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