Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb519cc243c519d8…

MALICIOUS

PDF

46.0 KB Created: 2020-03-29 01:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b775229b56ceba2a780412c03614fc02 SHA-1: a1e849b6f6cd78f0aa789427c3e77ef6481bcca2 SHA-256: fb519cc243c519d8234be453cdc85639854204862d0fe143b6f9b99a044468ba
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior. The ML classifier also strongly indicated maliciousness. The document body contains metadata related to GNS3 and wkhtmltopdf, but the primary malicious activity appears to be the mass distribution of external links.

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://host115.carmichaelnl.com/uploads/1/3/0/9/130969330/130969330.html#gns3+ios+images
    • http://yourprobank.com/uploads/1/3/0/4/130478210/00f69877a.pdf
    • http://www.woodbrothers-creations.com/uploads/1/3/0/2/130292013/zugomamujukidij-jiroluduzede-rojujifiwedim-jajegazo.pdf
    • http://flex87.pleasingfood.com/uploads/1/3/0/9/130969915/3d203dec.pdf
    • http://www.tpvantransport.com/uploads/1/3/0/8/130813931/6604879.pdf
    • http://webmail.annaydawson.com/uploads/1/3/0/2/130289344/denevezowuvukilitoz.pdf
    • http://reachandclean.org/uploads/1/3/0/6/130604723/bezekivilupipa_rowevuxukukito_tiron.pdf
    • http://www.randomgraphix.co.nz/uploads/1/3/0/6/130605179/8663413.pdf
    • http://goodsky.news/uploads/1/3/0/6/130605255/23a825b212032.pdf
    • http://panthersgame.dadgifts.us/uploads/1/3/0/6/130639027/2443798.pdf
    • http://kellytarnowski.com/uploads/1/3/0/5/130590431/boruwojuz_sixuzavu.pdf
    • http://www.returntosenderid.com/uploads/1/3/0/9/130969298/dodajoxojutal-sovamuluninix.pdf
    • http://mcgutter.com/uploads/1/3/0/4/130488750/nodipuxojuwidijam.pdf
    • http://elevageshagyari.com/uploads/1/3/0/9/130969500/47b9a683c17.pdf
    • http://fromfostertofabulous.com/uploads/1/3/0/7/130774962/gediwulowar.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_off000088d0.bin
29a492a345c9c640cb63b12fed53a461db71f703f36cf1c587c97c80e160a7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D0 9036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.