Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f7d5bb8d39ed55…

MALICIOUS

PDF

349.3 KB Created: 2015-08-20 07:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1f5598f777271d04d29852a5f67275f7 SHA-1: 68338e5577540e9145542a50eda2a31acf457d77 SHA-256: 94f7d5bb8d39ed55fb61e0ddaea0174b0c4dabc79ff651fd9701d2dd319f0745
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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=Adr+player+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4629/4629441_skachat_disk_pdd_belarus.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4627/4627155_skachat_prava_root_dlya_ispolzovaniya_freedom_na_android.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4627/4627624_skachat_besplatno_programmu_karaoke_s_ballami.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052de3.bin
e17e20611fad054eef1095bf0ea8b4c3ed7b6cc04847dfc7165dca2ddc8c75e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52DE3 9464 bytes
font_01_sfnt_off000547cd.bin
3559151a848c50f35e4f3c6e9bcfb854354421d012e1da1111a4b9085ba4f9cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547CD 15052 bytes

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