Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d8b4428cfcfbcc…

MALICIOUS

PDF

182.5 KB Created: 2015-08-05 16:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1960c2a6590bf5c996a17eb3f422efe4 SHA-1: 32a1ee89d5d38163e791804c2d3f9475935bf2b2 SHA-256: a9d8b4428cfcfbcc49648b9ee034c0100688cf88faaaa08ae175cfad4d013736
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 a known malicious redirector at http://botcraftman.ru/. This indicates the document is likely a lure to direct users to a malicious website. No scripts were extracted from this sample, and the document body was not sufficiently readable to infer further 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=+samsung+pc+suite&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305122_rebusuy_po_matematike_s_otvetami_6_klass.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304953_samsung_de68_03673d.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4306/4306084_anketirovanie_primeruy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off00029e5e.bin
3bf8bf8cdc02a2e3a587a367f772bdbf040c1195b2549dd702f879dde56e87f7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29E5E 6384 bytes
font_00_sfnt_off0002392f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2392F 3556 bytes
font_01_sfnt_off000246b2.bin
b25b790ca7b228fb6b84e7d35385fa866643e864ee2fcd163b53fdd922d2fda4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x246B2 14148 bytes
font_02_sfnt_off000272d8.bin
3f3b581faca9602ebec0b60d6105911464a3690ae07468fb2f03684aaa5a4dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x272D8 14744 bytes
font_04_sfnt_off0002b057.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B057 6084 bytes
font_05_sfnt_off0002bfec.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFEC 3752 bytes

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