Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b8cf5759e0ac6a…

MALICIOUS

PDF

32.4 KB Created: 2020-03-13 13:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 60b2a36b2e7dc183023aac2123d0b0e1 SHA-1: 5c56656c94bb75b78f79421efea211fa88e2438c SHA-256: f5b8cf5759e0ac6a493b700007dca83be846617df9daad6ddd4f01e80138d577
62 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, many of which point to similarly structured URLs on various domains. The document body text, though partially corrupted, includes a reference to 'Acido borico ficha de seguridad merck', suggesting a lure to a fake security data sheet. The primary heuristic indicates a PDF link farm, designed to drive traffic to numerous external pages. The embedded URLs are likely part of this SEO spam or phishing campaign.

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://brakeactive.com/uploads/1/3/0/2/130289703/130289703.html#acido+borico+ficha+de+seguridad+merck
    • http://releasingpotential.org/uploads/1/3/0/5/130588494/jenelubedeluwijavog.pdf
    • http://backyardgiantgames.com/uploads/1/3/0/5/130551880/9930048.pdf
    • http://norbertfodor.com/uploads/1/3/0/4/130483606/9095344.pdf
    • http://ashiyanallc.com/uploads/1/3/0/2/130288854/825858.pdf
    • http://www.ciposse.com/uploads/1/3/0/6/130620451/muzekafo.pdf
    • http://vandellsfanclub.com/uploads/1/3/0/8/130874156/dafaxov_viwijula.pdf
    • http://webdisk.wecreatestars.com/uploads/1/3/0/9/130969265/dadad_mutezasededer_segoxo_jokujudalow.pdf
    • http://norcalglad.com/uploads/1/3/0/6/130621109/zabalixibuk.pdf
    • http://bytcorp.org/uploads/1/3/0/4/130476458/peboz-mekul-muwifigenadima.pdf
    • http://angiemoll.com/uploads/1/3/0/7/130739573/xikenelimexanafod.pdf
    • http://hoozenconsulting.com/uploads/1/3/0/4/130489253/e6856388.pdf
    • http://yourjourneytravel.com/uploads/1/3/0/8/130814758/1459018.pdf
    • http://www.nataliecarney.com/uploads/1/3/0/6/130621788/630749.pdf
    • http://wmsperformingarts.com/uploads/1/3/0/3/130312912/voxap.pdf
    • http://opvakantie.org/uploads/1/3/0/2/130272474/gizedimi.pdf
    • http://www.serenemeadowshc.com/uploads/1/3/0/2/130289421/vovituxujatoji_pofidirira.pdf
    • http://azmendinglives.com/uploads/1/3/0/2/130270864/6299494.pdf
    • http://missmillersclassroom.com/uploads/1/3/0/6/130620985/566973.pdf
    • http://sanderellas.ca/uploads/1/3/0/7/130776850/4802731.pdf
    • http://brewcitynavhda.com/uploads/1/3/0/3/130323469/gunol.pdf
    • http://gmarinaccio.com/uploads/1/3/0/6/130620511/4516029.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_off000059c6.bin
6ae8f73ceef9cc2c80c5f28ec42621969c1680df5a4db86ca3ccd7b156f5faa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C6 6104 bytes

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