Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d3dc4d6ac71820…

MALICIOUS

PDF

357.4 KB Created: 2015-08-20 07:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 07bd0caf76cf57ae1f297827c129edd8 SHA-1: 6cd39495d54264dcddc19a127a994bb28215f4ab SHA-256: 70d3dc4d6ac7182038b6e91dbf489d85882ef458882950507a609ba1483458c3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is likely the initial stage of a phishing or malware delivery chain. No scripts were extracted, but the presence of a malicious redirector strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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=%D1%88%D0%BF%D0%B0%D1%80%D0%B3%D0%B0%D0%BB%D0%BA%D0%B8+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%B9+%D0%BB%D0%B8%D1%82%D0%B5%D1%80%D0%B0%D1%82%D1%83%D1%80%D0%B5+19+%D0%B2%D0%B5%D0%BA%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638793_rezultatuy_egye_po_russkomu_yazuyku_2015_god.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638808_schaste_feride_skachat_besplatno_kniga.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638939_polnaya_russkaya_povarennaya_kniga_anarhista_2003_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005525c.bin
9bd6510a104850d8fbd402960ac4a78c9db2a126e26d4e15a2f575dab00081d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5525C 8092 bytes
font_01_sfnt_off000569de.bin
a4f31970f9a2cc12a87cc025010deb724b56f26c66bb109fccfac5cb41d00e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569DE 13820 bytes

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