Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8828af22101b3d7…

MALICIOUS

PDF

185.2 KB Created: 2015-07-25 15:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f4f358b2afa68ab8719a236e4ffd2622 SHA-1: 6346db33ae67ab3b204a5bb686ce5d1e52106e3b SHA-256: e8828af22101b3d767fad7a57fe7f5025fe71d5be930de28416aff82065ae5f0
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, but the presence of the malicious link is sufficient to infer an attack pattern aimed at user redirection.

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=%D0%9A%D0%BB%D0%B8%D0%BF+%D0%B1%D1%8C%D1%8F%D0%BD%D0%BA%D0%B8+%D0%BF%D1%80%D0%BE+%D0%B7%D0%BE%D1%8E+%D0%B1%D0%B5%D0%B7+%D1%86%D0%B5%D0%BD%D0%B7%D1%83%D1%80%D1%8B+%D1%81%D0%BC%D0%BE%D1%82%D1%80%D0%B5%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4196/4196798_shantaram_skachat_besplatno_fb2.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4198/4198767_kollina_risovanie_s_detmi_4_5_let_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185022_skachat_stalker_zov_pripyati_mertvuyy_gorod_2_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024099.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24099 3556 bytes
font_01_sfnt_off00024e1c.bin
e0e79b6abf02e59bbe4b1405be1a778bf6df50bf54aa0c9087409d1131502c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E1C 14612 bytes
font_02_sfnt_off00027bef.bin
2894a2e95f819f01c1e340b533698417996480c8c8e83cbe4142995621a3eef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BEF 14468 bytes
font_03_sfnt_off0002a69f.bin
7e3287f2784f40c4dcba0966fddce24f03a9a260b637bdbb281643dc52745cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A69F 7052 bytes
font_04_sfnt_off0002bafb.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAFB 6084 bytes
font_05_sfnt_off0002ca90.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA90 3752 bytes

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