Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f13766874787ba…

MALICIOUS

PDF

188.8 KB Created: 2015-07-23 20:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: fd656e332fd8bb196174ce65d64b43a9 SHA-1: 413b383c6e986c0ec63dc5c3d2889ca1fddda9ff SHA-256: a7f13766874787baba18263a3b243a6402ecaecbe9879a99569f2fcf163c1d7c
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary IOC is the malicious URL, which is likely used to deliver a secondary payload or phish for credentials. No scripts were extracted from this sample.

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%BC%D0%B0%D0%B9%D0%BA%D1%80%D0%BE%D1%81%D0%BE%D1%84%D1%82+%D0%BE%D1%84%D0%B8%D1%81+2010+%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+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184480_kasting_vudmana_v_rossii_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184434_reshenie_zadach_s5_po_himii.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184350_yesse_po_obschestvu_primeruy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024def.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24DEF 3556 bytes
font_01_sfnt_off00025b72.bin
7a5a8d5261a1a3040b1001e7afba9093ac4b58249e0e48ab7f032bac7b523324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25B72 14692 bytes
font_02_sfnt_off0002898a.bin
a949981b14503b518f9ab23f757515b5b10c80369f86701cc36d0972d8422450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2898A 14468 bytes
font_03_sfnt_off0002b43f.bin
06dcbcd7c3e17d0039c8b8879a00c9eb917d91db164f6b20c7bf99bc215dee2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B43F 7276 bytes
font_04_sfnt_off0002c98f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C98F 6084 bytes
font_05_sfnt_off0002d924.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D924 3752 bytes

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