Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe43ed50e75ba4c8…

MALICIOUS

PDF

185.3 KB Created: 2015-07-23 20:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: fb5516c1dad93aa883885cbb4834cf47 SHA-1: f2d4b75f32ef008ef4d9deb857236922a475c35b SHA-256: fe43ed50e75ba4c88d17dfccfda6158f719caad24d9058fc875bca54abaa4643
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is a strong indicator of a malicious dropper. ClamAV also detected this file as Pdf.Dropper.Agent-7495179-0. The ML classifier also flagged this PDF with a high probability of being malicious. The primary attack pattern involves luring the user to click the malicious link, which likely leads to the download of a second-stage 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-7495179-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7495179-0
  • 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=%D0%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+java+%D0%B4%D0%BB%D1%8F+%D0%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+152&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183190_lazer_iz_dvd_privoda_svoimi_rukami_shema.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184297_skachat_stalker_chistoe_nebo_torrent_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184287_shpargalki_po_algebre_egye_2015.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023f1d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F1D 3556 bytes
font_01_sfnt_off00024ca0.bin
d355674fb4709379096ac2ff468834d5118192aac97eefe706baa4f337cc7d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CA0 14976 bytes
font_02_sfnt_off00027afa.bin
8ef0b374af6fdd72bca67961f8d100b15da25cc8169295d4347538684a5d55a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27AFA 14784 bytes
font_03_sfnt_off0002a6b9.bin
d01282066ed7298c1cc47ac16df5228e2162acd6a1e6e9664d7389151600a899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A6B9 7028 bytes
font_04_sfnt_off0002bb38.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB38 6084 bytes
font_05_sfnt_off0002cacd.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CACD 3752 bytes

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