Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac64981733fe7fc…

MALICIOUS

PDF

51.3 KB Created: 2020-06-08 11:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be8ea2c8390432c013d671a451be8b19 SHA-1: db33efba95aa9dafb18b14718b2208bd3afe0897 SHA-256: dac64981733fe7fcdf330217915c8bc086ba1da62497cc4290f9e091ef460e3f
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, many of which point to suspicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a malicious intent to distribute or redirect users. The ML classifier also strongly flagged this PDF as malicious. The document body text appears to be metadata and not user-facing content, further supporting that the primary malicious function is within the embedded links.

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://msgarletts-hancock.com/uploads/1/3/0/5/130541574/130541574.html#fundamentos+de+la+ciencia+e+ingenier%25C3%25ADa+de+materiales+pdf
    • http://32s.undesirable.us/uploads/1/3/0/2/130287302/doriwemedepun.pdf
    • http://futureglobalaerospace.net/uploads/1/3/1/8/131857038/sozeregowi-kosefa-muzusevateb.pdf
    • http://kintzmejiaballet.com/uploads/1/3/1/1/131164455/b0492acebd30e.pdf
    • http://paliisraeliconflict.com/uploads/1/3/0/7/130740553/pekereja_roxoronezegur_mofexopazoban_ranujoj.pdf
    • http://mx.historytellers.net/uploads/1/3/0/6/130604826/4775889.pdf
    • https://temitafewin.files.wordpress.com/2020/06/patabok.pdf
    • https://tabunujifafa.files.wordpress.com/2020/06/95665041899.pdf
    • https://mazagutote.files.wordpress.com/2020/06/59438761216.pdf
    • https://zowidunu.files.wordpress.com/2020/06/xeviladomi.pdf
    • https://jaxufuli.files.wordpress.com/2020/06/38205607658.pdf
    • https://jenonep.files.wordpress.com/2020/06/bomanowexonos.pdf
    • https://vivaguki.files.wordpress.com/2020/06/94232176663.pdf
    • https://tuzodesixux.files.wordpress.com/2020/06/rawibuxubexajotuvo.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ae0.bin
c5d12873e89fd228e7fd3766c49d60361397160386c73d3ffb6aeaf93a28a121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE0 11100 bytes

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