Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6c4d38071e485c…

MALICIOUS

PDF

40.4 KB Created: 2020-06-06 00:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5f04a361d14de2a802fb6d216b68971 SHA-1: 404f17381a244aab74a674fa72782ab63e0001b0 SHA-256: 2c6c4d38071e485c656941744b8dcf58747218ead32bc2dcaf3284f951db1beb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The document body, though partially corrupted, contains text related to 'Ringer nba draft guide 2018' and multiple URLs, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

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://trentriverdesigns.com/uploads/1/3/0/4/130488288/130488288.html#ringer+nba+draft+guide+2018
    • http://bt32llc.com/uploads/1/3/0/7/130739935/8acb52462f.pdf
    • http://artesania.store/uploads/1/3/1/6/131637072/ec7a9de3989f7.pdf
    • http://74-123-79-10.mgwnet.com/uploads/1/3/0/5/130539759/zitigoxikexorev.pdf
    • http://eggcartonsbulk.com/uploads/1/3/0/5/130551231/fec43d35575.pdf
    • http://mta-sts.susanaltamartin.com/uploads/1/3/0/8/130815124/6188288.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/4/130488288/terms.html
    • http://trentriverdesigns.com/uploads/1/3/0/4/130488288/dmca.html
    • http://trentriverdesigns.com/uploads/1/3/0/4/130488288/policy.html
    • https://gizoviwiwez.files.wordpress.com/2020/06/rivujedare.pdf
    • https://sumexarit.files.wordpress.com/2020/06/malebagu.pdf
    • https://rebofowi.files.wordpress.com/2020/06/66514081059.pdf
    • https://nososakuzeku.files.wordpress.com/2020/06/69952601220.pdf
    • https://xevubimeroz.files.wordpress.com/2020/06/tosuwuluxevoxa.pdf
    • https://kuvonalu.files.wordpress.com/2020/06/64854054236.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_off00007358.bin
e57c4e07b451c46a36667a75e6c76a6bf70a26eb6d50fae5bf6a687f231a6b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7358 10336 bytes

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