Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f165ce7bb6d4cfd…

MALICIOUS

PDF

32.9 KB Created: 2020-04-07 11:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d2229807cbe7e7fbbc4c651c4a26209c SHA-1: 3ad471c3c0770117c49a4aa78f047af80d1b47d4 SHA-256: 7f165ce7bb6d4cfdaab2a5a2de96c6e162edf25a661939e08aa4a0688b6e59af
92 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, a technique often used to redirect users to malicious websites for phishing or malware downloads. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://softwashsolutions.net/uploads/1/3/0/4/130491699/130491699.html#mainstays+5+shelf+bookcase
    • http://sasshumor.com/uploads/1/3/1/1/131163777/6935822.pdf
    • http://mainhealthsolutions.com/uploads/1/3/0/3/130379146/fabujog-jabutun.pdf
    • http://exhilaratingmemories.com/uploads/1/3/0/6/130620926/bd6673d24f.pdf
    • http://alquilotodo.com/uploads/1/3/0/5/130590117/7417107.pdf
    • http://northolmstedgymnastics.com/uploads/1/3/0/2/130270837/2882653.pdf
    • http://livingwaterchurch.info/uploads/1/3/0/3/130313398/darijoxos_fepiwofex_robapofufu.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000603b.bin
9da2e6bbe0f3ea1fd300817ff6af19965c69428dbb3bb187a83714a3b0377b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 8648 bytes

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