Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c20b5c0d26aa29d…

MALICIOUS

PDF

56.2 KB Created: 2020-04-26 21:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 40a973f441ccdc274bccd0a8f381914d SHA-1: 59718e0aa6ba61290558209bac10beffe895d233 SHA-256: 8c20b5c0d26aa29d974846a2168acad9bc176351c5b04be9f93e876a57e99253
62 Risk Score

Malware Insights

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

The PDF contains a lure for 'bandwidth checking software free' and is associated with a PDF link farm heuristic, indicating it's designed to drive traffic to other malicious PDFs. The primary heuristic identified a mass external PDF link farm hosted on giantrconline.com, suggesting a coordinated effort to distribute malicious content. The document body is heavily obfuscated, but the presence of URLs and the link farm heuristic strongly suggest a malicious intent to redirect users to further malicious downloads.

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://silvermediapartners.com/uploads/1/3/1/4/131408017/131408017.html#bandwidth+checking+software+free
    • http://giantrconline.com/uploads/1/3/0/5/130539479/d87b37.pdf
    • http://celebrationsandsweetcreations.com/uploads/1/3/0/7/130775050/fidojozari_xuzowesa_tebadifobugi_bunusawogazede.pdf
    • http://xactaclaimz.com/uploads/1/3/1/4/131437920/wudojan_gasunedugevugi_xanelixagepi.pdf
    • http://thesocialloonco.com/uploads/1/3/0/2/130291975/3657447.pdf
    • http://onelinkresources.com/uploads/1/3/1/6/131637125/7493230.pdf
    • http://showermedtherapy.com/uploads/1/3/0/2/130272548/4999586.pdf
    • http://rossmckean.com/uploads/1/3/0/5/130550901/nirozebuwitet.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_off0000b5da.bin
2a5b0273be24c5706338e159265ae019a28ab5fa527f7ab3e73052c662167704		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DA 8048 bytes

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