Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a670f8f69f4f893…

MALICIOUS

PDF

379.2 KB Created: 2015-08-20 13:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bff35338540c1c940d98f6f124cf9caf SHA-1: 0e1e9157786627d7e3569dbd6043793e3e94eda3 SHA-256: 8a670f8f69f4f89377b7adb202e4435c2e681cdb4b7b244aaf754dd77221c15e
90 Risk Score

Malware Insights

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

The PDF file contains an embedded link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be directing users to malicious infrastructure via the embedded URL, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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%B0%D0%BD%D0%B4%D1%80%D0%B5%D0%B9+%D0%B4%D1%8C%D1%8F%D0%BA%D0%BE%D0%B2+%D0%B7%D0%B0+%D0%B3%D0%BE%D1%80%D0%B8%D0%B7%D0%BE%D0%BD%D1%82+%D0%B0%D1%83%D0%B4%D0%B8%D0%BE%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4641/4641324_odkarpiuk_welcome_to_english_study_6.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4641/4641196_rezultatuy_egye_po_matematike_2015_murmanskaya_oblast.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640631_skachat_igru_f1_2015_cherez_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005a076.bin
f9bde4f800b7c086e2b7dc265cab3ce768164441ed5b3e016fd96c325963f7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A076 8228 bytes
font_01_sfnt_off0005b87b.bin
fd9d402ec3e6e768db1bca6361cf25f04aa12f59335b7a52cccc01632ebe17a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B87B 17836 bytes

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