Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1f20825bd1a39f…

MALICIOUS

PDF

187.5 KB Created: 2015-07-27 09:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 30db0d89dd1b635d47c10ba22795c3f5 SHA-1: 423fa44cf366b0698bfc941b7e0260d76ec37ab5 SHA-256: 4a1f20825bd1a39ff8e1ab7890670e8344f88ab45acefd77a6b8cfc30021de31
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The embedded URL `http://botcraftman.ru/...` is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download site. No scripts were extracted, and the document body was not sufficiently readable to provide further context.

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%82%D0%B5%D0%BC%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%BF%D1%80%D0%B5%D0%B7%D0%B5%D0%BD%D1%82%D0%B0%D1%86%D0%B8%D0%B9+powerpoint+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4223/4223955_skachat_igru_drag_racing_3d_na_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4196/4196050_skachat_besplatno_knigu_akunina_samaya_tainstvennaya_tayna.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4226/4226598_skachat_gta_5_dlya_psp.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024777.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24777 3556 bytes
font_01_sfnt_off000254fa.bin
433081cd0ffb01df7fdacf5c588b5e271e45a6e8e60406b8d933a0a5c3a46176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254FA 14532 bytes
font_02_sfnt_off00028204.bin
6040fd3c270e0edd940cb8a9a89e8c0c534134f5f4de4d8990640a269a3a7790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28204 14652 bytes
font_03_sfnt_off0002ad54.bin
0773694598b1792de2b4b44d9aae09fafc5ce0620c3735c4f003016aa7b75799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD54 7816 bytes
font_04_sfnt_off0002c449.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C449 6084 bytes
font_05_sfnt_off0002d3de.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3DE 3752 bytes

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