Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e0af95097c2999…

MALICIOUS

PDF

365.5 KB Created: 2015-08-20 09:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 5df82e8ff9f23a44f5722b52e86817be SHA-1: f57149b051c2aa1900cba6085a262dc0fb801a72 SHA-256: 04e0af95097c2999196f8e78fa23704dc5f034d49fca5cf561391601dfd6f623
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, but the presence of a malicious URL suggests an attempt to lure the user to a compromised site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%81%D1%82%D0%B0%D0%BB%D0%BA%D0%B5%D1%80+nlc+6+%D0%BD%D0%B0%D1%87%D0%B0%D0%BB%D0%BE+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640653_windows_7_ultimate_sp1_x86x64_beslam_edition_v10_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639666_shporuy_po_vuysshey_matematike_2_semestr.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639367_igruy_dlya_pristavki_ritmiks_rzx_44.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000569f3.bin
2aad1a9f869b5083d53289402a2e6dbb0700ef7da70f1b038031f173b9d34ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569F3 7604 bytes
font_01_sfnt_off00057fcb.bin
66be18fbd6781e10828eb56dff77c7226cf769d38419c0fbe0b1bdd074d733b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FCB 18228 bytes

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