Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca3bb15214c9dbd…

MALICIOUS

PDF

186.8 KB Created: 2015-07-25 06:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d008086b257e463166580bdab3f79d29 SHA-1: 638a551e4addb243a32ef1beef8ab5cb56b26f09 SHA-256: eca3bb15214c9dbdf8aaebebc6905f4e1749e616150c84424703b1561eaa7c6d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a critical heuristic firing indicating a malicious redirector link to botcraftman.ru. This, combined with ML and ClamAV detections, strongly suggests the PDF is designed to lure users to a malicious site. The primary IOC is the identified malicious URL, which is likely used to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7493466-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7493466-0
  • 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+%D0%BA%D0%BD%D0%B8%D0%B3%D1%83+%D0%BC%D0%B5%D1%87%D1%82%D0%B0%D1%82%D1%8C+%D0%BD%D0%B5+%D0%B2%D1%80%D0%B5%D0%B4%D0%BD%D0%BE+%D0%B1%D0%B0%D1%80%D0%B1%D0%B0%D1%80%D0%B0+%D1%88%D0%B5%D1%80&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191783_deklaraciya_3_ndfl_2013_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191687_podrostki_nudistuy_foto.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184329_faction_fronts_clear_sky_v221_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024768.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24768 3556 bytes
font_01_sfnt_off000254eb.bin
b0d11d9fd8f921ce1cf5c7c58541a483193458fa24bd0d2b94f6839a3b166719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254EB 14988 bytes
font_02_sfnt_off0002834b.bin
8c5e5bc4674cee60ec6c1619e60533ff44be00efca6b5f228c587d2f19a61a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2834B 14520 bytes
font_03_sfnt_off0002ae1a.bin
9db5cfb1dfb9198737378e438655ab6f8a047c79fae7f8cb066585b0077517cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE1A 6756 bytes
font_04_sfnt_off0002c18c.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C18C 6084 bytes
font_05_sfnt_off0002d121.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D121 3752 bytes

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