Malicious PDF — malware analysis report

Static analysis result for SHA-256 26179900f7c36eb4…

MALICIOUS

PDF

39.2 KB Created: 2020-03-09 09:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f63fa5241a4a6d5a47704a6ebbe859c2 SHA-1: 7686fd33a3fa6f7994b661996dd63b19f0c7984a SHA-256: 26179900f7c36eb469ee3b9f81871c614adccaf29adc880f394db4082d197885
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which appear to be part of an SEO link farm. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of websites, likely for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://michaelwellsart.com/uploads/1/3/0/4/130483667/130483667.html#can+kobo+ereader+read+kindle+books
    • http://sensorystationonline.com/uploads/1/3/0/6/130621606/7083677.pdf
    • http://www.syrosproductions.ca/uploads/1/3/0/4/130476697/nejetez.pdf
    • http://rankfirstsocialmediamarketing.com/uploads/1/3/0/2/130287548/tozaro.pdf
    • http://talesofthetravelingnurse.com/uploads/1/3/0/4/130488299/58298.pdf
    • http://www.crosswoundsfoundation.org/uploads/1/3/0/5/130590177/1bfc70.pdf
    • http://georgianbayveterinaryassociation.org/uploads/1/3/0/4/130483110/873df1a0.pdf
    • http://www.curaty.co.uk/uploads/1/3/0/3/130323547/573212.pdf
    • http://www.grace-cnc-tool.com/uploads/1/3/0/5/130589313/3628076.pdf
    • http://rainescampaign.com/uploads/1/3/0/6/130639791/42819.pdf
    • http://wandafulproductions.com/uploads/1/3/0/9/130969242/xavifivupariwaz.pdf
    • http://freshideamama.com/uploads/1/3/0/6/130640114/ebf910e1947c0.pdf
    • http://thehouseacrosstheway.com/uploads/1/3/0/3/130324357/1781679.pdf
    • http://myfampow.com/uploads/1/3/0/2/130289163/kijosufoviri-xiguzamexudemev-medegikabid-xunajelokodoso.pdf
    • http://uwduurzaamdak.be/uploads/1/3/0/9/130969056/5771596.pdf
    • http://www.prime-labs.com/uploads/1/3/0/2/130289638/tozapavujipule.pdf
    • http://mentalhealthyouthteacher.com/uploads/1/3/0/5/130546657/9240138.pdf
    • http://newresume2019.com/uploads/1/3/0/6/130604767/lufanozazijulutides.pdf
    • http://mshroff.net/uploads/1/3/0/7/130740262/puwimoviza.pdf
    • http://www.dianefelice.com/uploads/1/3/0/7/130776492/8188014.pdf
    • http://ritasoto.com/uploads/1/3/0/5/130550940/tejegapupovigaj.pdf
    • http://deeprootsmountainrevival.com/uploads/1/3/0/5/130589099/7113172.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_off00006fe0.bin
ed768d027eb3056e97a5d356d189f1518480bcc758482291dd6ba5a537ec437e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 8048 bytes

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