Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57bea4e92c0221b…

MALICIOUS

PDF

31.3 KB Created: 2020-06-06 16:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c127651950acd212d198428e2b5b51 SHA-1: 20b4f9699485279481f1d4575b6b1001f491415e SHA-256: d57bea4e92c0221b5af5ddaa3c421b41b3790761ba7d80ad101df2926643f9ad
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains URLs that are also present in the list of extracted URLs. The primary function appears to be directing users to a network of linked PDF files, potentially for SEO spam or to serve as a distribution point for further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://nashobavalleyextractco.com/uploads/1/3/0/6/130639214/130639214.html#reel+music+roger+hickman+2nd+edition
    • http://themilllofts.com/uploads/1/3/1/1/131164249/kanixafamete.pdf
    • http://m-opanthers.org/uploads/1/3/0/7/130775519/notanutamo.pdf
    • http://hostmaster.babycastinguk.co.uk/uploads/1/3/1/4/131407876/fujekemalejila-getudizivafoba-soletowupu.pdf
    • http://josephinezipporah.com/uploads/1/3/0/7/130738786/maxitoxapufexuwe.pdf
    • http://persuasionlabs.com/uploads/1/3/1/4/131438848/wakabajabitudimulep.pdf
    • http://e-tekit.com/uploads/1/3/0/7/130740089/6794702.pdf
    • http://zonemaster.johnogink.nl/uploads/1/3/0/7/130738796/a437d7027105.pdf
    • http://hostmaster.emmamower.com/uploads/1/3/0/2/130272488/komefiwemi.pdf
    • http://whagoingon.com/uploads/1/3/0/8/130873781/jugarufugakiwiveve.pdf
    • http://steelstringsmusic.com/uploads/1/3/0/3/130323998/pisurer_somagumupox.pdf
    • http://grecooutdoor.com/uploads/1/3/0/7/130776055/baxegepedolun.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/6/130639214/terms.html
    • http://nashobavalleyextractco.com/uploads/1/3/0/6/130639214/dmca.html
    • http://nashobavalleyextractco.com/uploads/1/3/0/6/130639214/policy.html
    • https://dixurozazix.files.wordpress.com/2020/06/minovoradujawevejalapigoz.pdf
    • https://tiruwomexeja.files.wordpress.com/2020/06/luwajalubudafix.pdf
    • https://lokujekazo902915772.files.wordpress.com/2020/06/26242563313.pdf
    • https://ruvirimijoxi.files.wordpress.com/2020/06/94628470468.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_off00004fbb.bin
bc14bc733d68354ac8784e6ef1fafb78a5a7cd9f7519fd82c413bd38fe6a34fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBB 9964 bytes

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