Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3bdb58aef07f03…

MALICIOUS

PDF

44.9 KB Created: 2020-05-26 05:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd55f464e8b04b6b71eca2f1755ff6d SHA-1: a9adaaa5674fb417afc7dcdead4ec32b22a5f6ee SHA-256: ef3bdb58aef07f03c18e383ec4351ec9070db4fea57c473e8b18773400273033
92 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The primary heuristic identified a link farm of 30 external PDF links, suggesting a coordinated effort to distribute content or malware across multiple domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://thebusinesstip.com/uploads/1/3/0/5/130544067/130544067.html#eternal+sunshine+of+the+spotless+mind+poem
    • http://crystalballexotics.com/uploads/1/3/1/4/131437967/tarafigo.pdf
    • http://alcinemaksa.com/uploads/1/3/1/1/131164534/wiluj.pdf
    • http://vvsphoto.com/uploads/1/3/0/2/130272417/gelalaxusuzitibebife.pdf
    • http://pinetoplodge.com/uploads/1/3/1/4/131483453/4416899.pdf
    • http://jubileefarmva.com/uploads/1/3/1/1/131163643/440b6.pdf
    • http://bricknjhealthinsurance.com/uploads/1/3/0/5/130551823/7054147.pdf
    • http://collinsphotography.org/uploads/1/3/0/5/130588847/4041101.pdf
    • http://stronglandscapecontractors.com/uploads/1/3/0/6/130620470/533663.pdf
    • http://chaitest.com/uploads/1/3/1/3/131380288/fenuretakorifi_sesadavuzofed.pdf
    • http://jasonrefsland.com/uploads/1/3/0/5/130588956/voduvozasis.pdf
    • http://viperfisharts.net/uploads/1/3/1/4/131482988/1818782.pdf
    • http://tenessajadeflowers.com/uploads/1/3/0/3/130313411/susufejof.pdf
    • http://townofgananoque.ca/uploads/1/3/0/5/130551222/balogig.pdf
    • http://cpanel.thedaisyrose.com/uploads/1/3/1/4/131437864/3048563.pdf
    • http://stepupcoaching.nl/uploads/1/3/0/5/130551130/gapes.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_off00008598.bin
3b78f5bf508fa72a6c755592ef770288a9ed99cd9e84ec745b68056c794bcb31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 10100 bytes

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