Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaf03e906cae38c…

MALICIOUS

PDF

53.9 KB Created: 2020-04-23 18:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 69ea2ea4e5abbd68c6c0cbc263f010b5 SHA-1: a17328daa450bc526d98db953d2eb7dfb738c0b5 SHA-256: 4aaf03e906cae38cf4279a5ef058603abba0fe023f69285ef7717c0a9dccef66
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though obfuscated, includes a reference to 'learn auto mechanics pdf', suggesting a lure. The primary attack pattern involves SEO link farming, likely to manipulate search engine results or distribute malicious payloads via the numerous linked PDFs. 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://mrs-mills.com/uploads/1/3/0/4/130488732/130488732.html#learn+auto+mechanics+pdf
    • http://lenkandeli.com/uploads/1/3/0/6/130604523/gewanovozadosuxot.pdf
    • http://rndassociates.net/uploads/1/3/1/1/131164174/zedisami_wunawixadijol_weripukowil.pdf
    • http://rhinestahlsummercelebration.com/uploads/1/3/0/7/130775734/9402993.pdf
    • http://localgta420.com/uploads/1/3/0/4/130477882/b2a86cc.pdf
    • http://bidx.live/uploads/1/3/0/3/130324440/wemepare.pdf
    • http://wbrauto.com/uploads/1/3/0/6/130639958/berin_jiropejiva.pdf
    • http://unknownmuzic.com/uploads/1/3/1/4/131410662/9508171.pdf
    • http://sociedadabierta.org/uploads/1/3/0/2/130289224/mepidut.pdf
    • http://buzziebugs.com/uploads/1/3/0/6/130621496/bebukojiluz.pdf
    • http://rivierapsychotherapy.com/uploads/1/3/1/3/131398154/menojav.pdf
    • http://redpilltube.com/uploads/1/3/1/4/131438309/6526310.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_off0000aaa3.bin
967df4bd587bf147e16c722d30243a6382ef4646517742ae81c685c73d252953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA3 8544 bytes

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