Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5c4c4fe692b78a…

MALICIOUS

PDF

39.5 KB Created: 2020-04-06 04:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b991d6a03d0561b94885186518e8cbf4 SHA-1: 9e01dbf234297f3050859aab8b447b2a36443c6a SHA-256: ed5c4c4fe692b78a2d86e44d724b16b10e89ddbfb71ab6aefd32ef981b61502a
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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. The document body text and embedded URLs suggest a lure related to 'Tratamiento fisioterapeutico de la artritis reumatoide pdf', which is likely a deceptive pretext to drive traffic to the linked content. No scripts were extracted, limiting the analysis of direct payload execution.

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://gocarpetpros.com/uploads/1/3/0/6/130621530/130621530.html#tratamiento+fisioterapeutico+de+la+artritis+reumatoide+pdf
    • http://jackiesoftlyconsulting.com/uploads/1/3/0/7/130739046/desepisenupamok-luvew.pdf
    • http://livingyourlegacy.net/uploads/1/3/0/6/130603798/vozenalaxutuwus.pdf
    • http://creativecomputer.info/uploads/1/3/0/4/130483443/begulojabosop_nesugulajirawi_golupikixe.pdf
    • http://tytaniafairy.com/uploads/1/3/0/8/130813079/tagaxurudejobuga.pdf
    • http://hatsbyclaudiasanders.com/uploads/1/3/0/6/130605374/tanusum-kujufutaxaribo.pdf
    • http://grandviewlodgeandresort.com/uploads/1/3/0/7/130776204/5084007.pdf
    • http://gospellifechurch.ca/uploads/1/3/0/7/130738870/134656.pdf
    • http://marcellusrocks.info/uploads/1/3/0/6/130604338/gapalinon-kugukolubagix-lavagerukeso-wepemoji.pdf
    • http://jeffgraef.com/uploads/1/3/0/5/130543212/pedoziwataxigudefave.pdf
    • http://woombiemedpodswholesale.com/uploads/1/3/0/6/130621130/kanejonadad_wamapima.pdf
    • http://ethostax.com/uploads/1/3/0/6/130604772/1278274.pdf
    • http://seaturtleproductions.net/uploads/1/3/0/7/130740297/tuzemituzil.pdf
    • http://speak4silentvoices.com/uploads/1/3/0/6/130603939/5195834.pdf
    • http://romehotels.nl/uploads/1/3/0/3/130379115/vefanititogob_wupusab_zasekakubaxir.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_off00006dfa.bin
8efc805fcd58e7491cb3754e342b13136d6186cd44d1ae03345a69428ce05907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 9112 bytes

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