Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd2951fc3aec1c5…

MALICIOUS

PDF

342.4 KB Created: 2015-08-21 09:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: dae24cff18549ee090acaefd23c8b395 SHA-1: a1168c08ddfb32d54ba153bd1ad87acf0aab1ade SHA-256: cfd2951fc3aec1c59257edba915818a32679357573b111b705f56c318781a34f
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and truncated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware delivery attempt.

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=I+exam+%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B+%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654818_svezhie_klyuchi_nod_32_na_90_dney.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654675_dnevniki_vampira_10_kniga_ohotniki_obretaya_sudbu_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654863_igrat_imenem_korolya_3_igrat_onlayn_besplatno_na_russkom.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000512e2.bin
31efa0b45bc038081867a37e302b2883ca3bf087b2e28f0cfef77cb554d673c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x512E2 9036 bytes
font_01_sfnt_off00052bdd.bin
e02b556c8b2cf9a5dbef074332849a3ea059fddb013dea09410d45fc187dcda7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BDD 15068 bytes

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