Malicious PDF — malware analysis report

Static analysis result for SHA-256 da531009fd143c27…

MALICIOUS

PDF

45.3 KB Created: 2020-04-10 17:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b415fa6a8795f0382ece216d7dab15f4 SHA-1: ed2fa14a4c75b14d66b89b4216785630e0e9f633 SHA-256: da531009fd143c27fa115126e14376fe99c2ff953fda937974e8d8594cfbc6b8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. The document body, though heavily obfuscated, contains references to '2011 hyundai sonata manual start', suggesting a lure to attract users to potentially malicious websites. The primary attack pattern involves redirecting users to external URLs hosted on domains like nugrun.info and tabasandrosen.com.

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://nugrun.info/uploads/1/3/0/7/130740050/130740050.html#2011+hyundai+sonata+manual+start
    • http://tabasandrosen.com/uploads/1/3/0/5/130551130/4216013.pdf
    • http://healthfromthenature.com/uploads/1/3/0/7/130740174/5396623.pdf
    • http://ohtafilmfest.com/uploads/1/3/1/4/131438443/6938cf3.pdf
    • http://carissascandlesandbath.com/uploads/1/3/0/7/130775371/zolanifutuji_ximefafobuvup_rixaxidakixiteb_sodevuxef.pdf
    • http://danvillesanramonpainter.com/uploads/1/3/1/4/131438629/6672067.pdf
    • http://alexjkrause.com/uploads/1/3/0/5/130588349/7d04a7e68448.pdf
    • http://jessieshomemadegranola.com/uploads/1/3/0/7/130775260/5454396.pdf
    • http://thelearningnest.net/uploads/1/3/1/4/131483170/1698915.pdf
    • http://silverstarrgroup.com/uploads/1/3/0/4/130436306/xilutunozufopel_vadejulakodebed_vagokiguxu.pdf
    • http://yankeesaddicts.com/uploads/1/3/0/2/130289387/07fe70e.pdf
    • http://ebatesreview.com/uploads/1/3/0/6/130640107/nikulatobedin.pdf
    • http://physionary.com/uploads/1/3/0/4/130435600/ziwinidesa-vasuxulorixubaw-xijobabofal-tugajafoj.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_off00008adf.bin
cf9135af12b942d0551ad90d013f145caaa6b230df8ecf77c9a41e4020128b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADF 7572 bytes

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