Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8a6c6cef7c3c66…

MALICIOUS

PDF

34.1 KB Created: 2020-04-08 10:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4eeb69b08e5028b7416745950cecf389 SHA-1: 63e31df472ff1ed4c7dbb3088be42ff53b6dee25 SHA-256: 2f8a6c6cef7c3c66fb6e1f6077b3d2cbee87afa6b940833a479c0202c8f3ca72
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though partially corrupted, suggests a lure related to 'lds hymn now let us rejoice lyrics'. The primary heuristic firing indicates a 'PDF_SEO_LINK_FARM', suggesting the document's purpose is to drive traffic to these external sites, which could host further malicious content or phishing pages. No scripts were extracted from this sample.

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://zumarock.org/uploads/1/3/0/7/130776272/130776272.html#lds+hymn+now+let+us+rejoice+lyrics
    • http://1stsolutionmedia.com/uploads/1/3/0/7/130740561/a38d5185e.pdf
    • http://ewelinapas.com/uploads/1/3/0/3/130379485/a24b99.pdf
    • http://itoms.at/uploads/1/3/1/3/131380433/5759539.pdf
    • http://independentlivingfortheaspiringmusicianmerchandise.com/uploads/1/3/0/4/130483765/fesikegujib_xozefije_zeruxi_wopopugevuz.pdf
    • http://maceratateatro.it/uploads/1/3/0/5/130588845/vixunitolebe.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_off00005c37.bin
6a6c5951221cc33889119a6f9c515084f6a77d689e04f403f3acf2535cab8728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C37 8280 bytes

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