Malicious PDF — malware analysis report

Static analysis result for SHA-256 da640122fce8f622…

MALICIOUS

PDF

40.0 KB Created: 2020-03-29 04:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bbceaa6084fefeb91e86830a1f704108 SHA-1: 364e27094b7822895c7067c03c4a5fb6b541630d SHA-256: da640122fce8f6223629983d89c08f38bcc2bcf59964f8fea6d95026f79b6eef
92 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, a technique often used for SEO link farms or to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'vintage messages' and includes a primary URL that further supports a lure-based attack. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm, suggesting the primary goal is to drive traffic to potentially compromised or malicious domains.

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://nationalriskmanagementgroup.com/uploads/1/3/0/5/130551641/130551641.html#plantillas+para+escribir+mensajes+vintage
    • http://rustydustylusty.com/uploads/1/3/1/1/131164122/7dee7efe67.pdf
    • http://reflectionsgr.com/uploads/1/3/0/6/130604466/bosuwogupadarulonol.pdf
    • http://homes-san-francisco.com/uploads/1/3/0/2/130289274/xakovo-zatifi-fidaz-juwewukitubu.pdf
    • http://mail.freshskintattoos.com/uploads/1/3/0/7/130776655/sufawafewoluk.pdf
    • http://godofbeads.com/uploads/1/3/0/6/130621264/7196244.pdf
    • http://sylteszeri.com/uploads/1/3/0/7/130740414/wapirekevotav.pdf
    • http://worldnouns.com/uploads/1/3/0/6/130639899/pesoxemixasikudu.pdf
    • http://mycleanohio.com/uploads/1/3/0/5/130550736/4943016.pdf
    • http://timeforchangeconsulting.com/uploads/1/3/0/8/130874086/vowusudamuzen.pdf
    • http://lll-lawncare.com/uploads/1/3/1/0/131070113/voliz.pdf
    • http://miguelsanostory.com/uploads/1/3/0/6/130639336/691ec43.pdf
    • http://nooral-jinahclinic.com/uploads/1/3/0/6/130621106/saketetajogo-lizateme-busopabavenefid-gubuw.pdf
    • http://www.heidifasteraune.com/uploads/1/3/0/6/130639537/4233311.pdf
    • http://marthasvineyardmakeup.com/uploads/1/3/0/8/130813546/bf94b8d481a46d4.pdf
    • http://greenbeansaves.com/uploads/1/3/0/4/130476048/6cf89f1dd8989.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_off00006f73.bin
edcfd5fc185c36ec54ffbae610a07936bd6d138220b5841baccb9efb1e46b99e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 9228 bytes

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