Malicious PDF — malware analysis report

Static analysis result for SHA-256 296d71d42f5f6cf3…

MALICIOUS

PDF

37.7 KB Created: 2020-03-23 16:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a5fe65fa3b253a150f831c35da812453 SHA-1: 4add3f25541ffcabb74c7a91b9688a548636491e SHA-256: 296d71d42f5f6cf3e07868a448b2a6213208045ddf429295f5775c0e9f83bb00
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm. The primary URL points to a toastmaster script, likely a lure. The ML classifier strongly flagged this PDF as malicious. The presence of numerous SEO-optimized URLs suggests an attempt to manipulate search engine results or distribute malicious content indirectly.

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://thehnossaproject.com/uploads/1/3/0/5/130552084/130552084.html#toastmaster+table+topics+contest+chair+script
    • http://dongreys.com/uploads/1/3/0/7/130739174/gamanisejesidonefovi.pdf
    • http://woodlandstuition.com/uploads/1/3/0/6/130639652/sokipivowuzavusomi.pdf
    • http://www.getidialogue.com/uploads/1/3/0/8/130874413/vitoludapigeb.pdf
    • http://susanbranton.com/uploads/1/3/0/2/130272573/vubuvazajafa_pufim_damesufe_gumarutonog.pdf
    • http://hiphipreviews.com/uploads/1/3/0/2/130292173/e8d97d08.pdf
    • http://theburkefoundation.com/uploads/1/3/0/5/130551925/bcced.pdf
    • http://www.pirineusexperience.org/uploads/1/3/0/4/130478314/7fe63dbbce.pdf
    • http://www.anita-seamstress.com/uploads/1/3/0/6/130603943/xumederu-zadasaxo.pdf
    • http://hostmaster.heinrichtoh.com/uploads/1/3/0/6/130639382/zoxoluj-fijujiza.pdf
    • http://mexicalfoodtruck.com/uploads/1/3/0/5/130588251/039237f9.pdf
    • http://www.local5jatc.org/uploads/1/3/0/7/130738781/5676785.pdf
    • http://buxidesign.com/uploads/1/3/0/5/130588187/movif_siwijilawenu_fabokuzopetadaf_tazipopajira.pdf
    • http://mocheeks.com/uploads/1/3/0/7/130776222/4828848.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_off00005869.bin
ef44d65c757539f5047427e0fe7527127e624952af6e571c66ff308dd7caf17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 6596 bytes
font_01_sfnt_off000072c4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 16036 bytes

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