Malicious PDF — malware analysis report

Static analysis result for SHA-256 1335c6aa705084c2…

MALICIOUS

PDF

361.8 KB Created: 2015-08-25 22:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-06-17
MD5: 4231c8179424b109586b9a0ff70c2df2 SHA-1: 87a18625be489e17389d88e8d674bdf912de729b SHA-256: 1335c6aa705084c2a8db96c6e7725f249b73ada0b352464611238ec6df454efb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'http://botcraftman.ru/'. This URL is likely used to lure users to a malicious site for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator 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=%D0%B1%D1%80%D0%BE%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5+%D1%82%D0%B0%D0%BD%D0%BA%D0%BE%D0%B2+%D0%B2+world+of+tanks&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740604_skachat__chit__na_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740546_v__trave__sidel_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740581_skachat__kartu__dlya_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C63 9576 bytes
SHA-256: d45cb4da68ec29dc58d80a8ff91a5e5ac0722d81730394b0f2803acdb6c7770e
font_01_sfnt_off00057780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57780 15452 bytes
SHA-256: 5e1c772cbfd7c2941d9c44cbf4bd09901876ab6fdf0faa3bc8d1603b3cf4ca0c

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