Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f61e420ea4a2673…

MALICIOUS

PDF

36.2 KB Created: 2020-06-22 17:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd5469dcea1c934aa06d88e379558341 SHA-1: 9954a6e0dbec19e414516c00660434a2293aac56 SHA-256: 4f61e420ea4a2673ff939c6bbdc5245eeb2ba3553bed6b1d02d041a10fbbb175
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on unrelated domains and appear to be part of a link farm. The document body, though obfuscated, contains references to 'Akeelah and the bee lesson plan' and the URLs themselves suggest a lure to potentially malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bitcoinminers4sale.net/uploads/1/3/1/4/131437554/131437554.html#akeelah+and+the+bee+lesson+plan
    • http://sidorlando.com/uploads/1/3/1/3/131398583/ef3d9ccc51c.pdf
    • http://1em.undesirable.us/uploads/1/3/1/4/131437348/ba400ce0.pdf
    • http://kingcountymuseum.com/uploads/1/3/1/4/131437312/2996928.pdf
    • http://aquestbegins.prayerknight.com/uploads/1/3/1/6/131606305/6399243.pdf
    • http://warehousesixmusic.com/uploads/1/3/0/5/130589194/3069148.pdf
    • http://thecollecktive.com/uploads/1/3/0/7/130776702/neduz.pdf
    • http://autodiscover.margaretmorrisonhighlanddance.com/uploads/1/3/0/5/130545818/25e9323a46deeb3.pdf
    • http://alianzasvalladolid.com/uploads/1/3/0/2/130287289/pugegamote.pdf
    • http://admin.improvisationacademy.co.uk/uploads/1/3/0/2/130289479/3201116.pdf
    • http://anisahjabar.com/uploads/1/3/0/6/130639624/f7a54c27.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_off00004f79.bin
b4ded56f3e3e57e5291097a072d7dc5ff6200fc657373faebf7b5970eca5718f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F79 4884 bytes
font_01_sfnt_off00005ffa.bin
fc4ac06a120623b07fa883997021c3e666687d73fae0c89fb7f099dfc00385c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 10772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.