Malicious PDF — malware analysis report

Static analysis result for SHA-256 13104fbc535b62e8…

MALICIOUS

PDF

351.7 KB Created: 2015-08-29 12:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-07-07
MD5: 41c432df7279a8ecf424beea7a7ffc6e SHA-1: 2c17e4768321d5be9b3944b7fa69ad50070616b9 SHA-256: 13104fbc535b62e85fcf1623709725f795942fdfaee3b5d5fa9dd803d6d6d3ea
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to botcraftman.ru. The ML classifier also flagged the document with high confidence. Although no scripts were extracted, the presence of a malicious URL strongly 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 0.9979

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=croteam+serious+sam+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830920_skachat__oblozhki__dlya_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830160_skachat__temu__vindovs_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4831/4831214_chto__napisat__devushke_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B10 8416 bytes
SHA-256: dd619b5aca5066be387ee1aba3e183f0522f5226a6682f13168d0f19a17a3b50
font_01_sfnt_off00055272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55272 14884 bytes
SHA-256: 011e077d2ab1125587e90378690d5fcb1c61a49df5bb72d47cac186550ea2960

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