Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91713673765abf0…

MALICIOUS

PDF

360.5 KB Created: 2015-08-25 15:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: cc0d52750ec7581007cf600f062cb7de SHA-1: 5578baa91eb1abac1524e1576366d46ff260cb2d SHA-256: c91713673765abf009b4449a08cefe666146e67335a5f529eee1ea6f4ba477dd
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The primary malicious URL identified is http://botcraftman.ru/. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable, but the presence of the malicious link is sufficient evidence of a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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%BE%D0%BD%D0%B0+%D0%B2%D1%81%D1%8F+%D1%82%D0%B0%D0%BA%D0%B0%D1%8F+%D0%BD%D0%B8%D1%85%D1%83%D1%8F+%D1%81%D0%B5%D0%B1%D0%B5+%D1%86%D0%B0%D1%86%D0%B0+%D1%82%D0%B5%D0%BA%D1%81%D1%82+%D0%BF%D0%B5%D1%81%D0%BD%D0%B8&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731671_skachat__pokemonuy__1_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731896_monstr__hay__13_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731608_star__wars__jedi_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055ba7.bin
aaecae04917f200b021d1a3846499a0b0e2fe7b4fae2a26f399c48defbcd33f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BA7 7916 bytes
font_01_sfnt_off000572fa.bin
55d551aaceac6315349bcda98babdbb2d17ba30f4a2a72412e92f0f4d28aee7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572FA 15692 bytes

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