Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0f63391f853b98…

MALICIOUS

PDF

45.2 KB Created: 2020-06-10 14:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd69ea8088dc68ebf992fd3e977a4b04 SHA-1: 92e2d566f17733fbfac252476a13df0894d9e7c0 SHA-256: 8c0f63391f853b9828f99d7ea2f870eecb6aaddadd53ce424b0c9e7c70bfdd22
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The embedded URLs are likely used to distribute spam or potentially lead to further malicious downloads, although no specific script execution was detected within this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://steampunkscott.com/uploads/1/3/0/7/130739661/130739661.html#%25C3%25B6%25C4%259Fretim+ilke+ve+y%25C3%25B6ntemleri+%25C3%25A7%25C4%25B1km%25C4%25B1%25C5%259F+so
    • http://reliableboosts.com/uploads/1/3/1/3/131381332/jugotubesexakug.pdf
    • http://nathanlyons.com/uploads/1/3/0/7/130739348/ropepus.pdf
    • http://galroga.com/uploads/1/3/0/7/130739480/nofenud.pdf
    • http://jagxfitnesscoaching.com/uploads/1/3/1/6/131606203/f6766c1b20fc981.pdf
    • http://pressandstitch.com/uploads/1/3/1/3/131383532/xurekufekubiwewakoxi.pdf
    • http://curleyscience.com/uploads/1/3/1/0/131070230/titarelidaxupake.pdf
    • https://xowaduwowere.files.wordpress.com/2020/06/43466374053.pdf
    • https://zosoborazudu.files.wordpress.com/2020/06/82024980768.pdf
    • https://wupefosa.files.wordpress.com/2020/06/36298325897.pdf
    • https://jawajadepoj.files.wordpress.com/2020/06/90789164252.pdf
    • https://kuvilagegap.files.wordpress.com/2020/06/jomuvemola.pdf
    • https://vevumoruv.files.wordpress.com/2020/06/84814148292.pdf
    • https://miselimex.files.wordpress.com/2020/06/vijaroxow.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683f.bin
a141fcb3b19eea25568dc6f0fd14296de2c931cac4617ccd1fd305d00ac95e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 13560 bytes
font_01_sfnt_off0000900f.bin
0db00a857ac78bc1e0cc158bf420d16c44f1e065a37377a9f31922e4a8b5b627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900F 16584 bytes

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