Malicious PDF — malware analysis report

Static analysis result for SHA-256 441d6f2d475ddd42…

MALICIOUS

PDF

183.7 KB Created: 2015-07-24 12:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b7f4737c8ec969385631e0244fdb3646 SHA-1: f34f7e9c356b046cea7de0b2355671d8b8bf160a SHA-256: 441d6f2d475ddd42b8beafe392227a5da927505de062e5f4b9b451d82548495e
158 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a malicious redirector link and a ClamAV detection for Pdf.Dropper.Agent-8786821-0. The embedded JavaScript stream and the malicious URL indicate that this document is likely intended to lure users to a malicious site, potentially for further exploitation or malware delivery. The ML classifier also strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • 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-8786821-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8786821-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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%D1%80%D1%8F%D0%BA+%D0%B4%D0%BB%D1%8F+portal+2&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184890_smotret_multik_maynkraft_priklyucheniya_nuba_vse_serii.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192241_yelchin_safarli_mne_tebya_obeschali_skachat_na_ipad.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192267_chit_na_kristalluy_dlya_tanki_onlayn.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023c23.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C23 3556 bytes
font_01_sfnt_off000249a6.bin
12c5e1cc943cdcd260a106cb3f98098c315c171a9ce3bd10e4f7f4d959ce2d36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249A6 14436 bytes
font_02_sfnt_off0002769d.bin
700c4c437c63838523f26544ff502856bd56d6e4a881ba485521fddefd087f04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2769D 14576 bytes
font_03_sfnt_off0002a1ac.bin
07b971cf742d98b5542f31ea54497669ef8aa9cf409f5d7cb83981b3db9f4dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1AC 6712 bytes
font_04_sfnt_off0002b4ff.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4FF 6084 bytes
font_05_sfnt_off0002c494.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C494 3752 bytes

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