Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de94abf22bcec3a…

MALICIOUS

PDF

377.3 KB Created: 2015-08-29 11:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 82962e8d15acd35f26381de207fcca25 SHA-1: 4725a1bc8788b7bc7134086ca03d30ebd83500af SHA-256: 3de94abf22bcec3a62379b6593b37f78a8b6c596356d0767c232862c945fc1e1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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=%D0%BC%D0%B0%D1%80%D0%BA%D0%B8%D0%B7+%D0%B4%D0%B5+%D1%81%D0%B0%D0%B4+%D0%BA%D0%BD%D0%B8%D0%B3%D0%B8&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829823_testirovanie__cpd__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829938_maynkraft__1710__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830269_kontrolnaya__po__matematike_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059de9.bin
50231b9d7476ed52b6ae62c8a4f70bc460eeec740f4a07bbb3dad22ad0efa11e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DE9 7928 bytes
font_01_sfnt_off0005b539.bin
b45c86250fc3c0ce2b21da2c5d105e5ae2609e834f52421b99ed660c1f7e84d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B539 15556 bytes

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