Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4c821455493b6b…

MALICIOUS

PDF

46.3 KB Created: 2020-06-08 01:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afce92c62130112e53bc5afb52f7a2d4 SHA-1: b37cc8c1f9c159e54e2046987561b9172a32f6a6 SHA-256: dd4c821455493b6be3c44860042d6f244e5a83d30567000f03c405a79988ad84
92 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to domains designed to mimic legitimate content or services, such as legal or professional documents. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a coordinated effort to distribute malicious content or conduct phishing. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern involves luring users to external sites via embedded links.

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://host221.carmichaelnl.com/uploads/1/3/0/5/130541271/130541271.html#osha+29+cfr+1910+pdf+espa%25C3%25B1ol
    • http://2ux.undesirable.us/uploads/1/3/0/5/130551197/9595544.pdf
    • http://utahonlinelawfirm.com/uploads/1/3/0/6/130603925/5875687.pdf
    • http://katrinacjohnsonphd.com/uploads/1/3/1/6/131606940/nobegalagiripazevepu.pdf
    • http://perfectoitaly.com/uploads/1/3/0/7/130739169/finisuvokowopotodu.pdf
    • http://franco12.com/uploads/1/3/0/2/130289189/litufuwuvuwasimativ.pdf
    • http://highabovetheice.com/uploads/1/3/0/5/130590158/40b041162f32c.pdf
    • http://franco12.com/uploa
    • https://nuragil.files.wordpress.com/2020/06/41003526018.pdf
    • https://fagasufirosi.files.wordpress.com/2020/06/vebemedakotavaxixunukide.pdf
    • https://jilatuwim.files.wordpress.com/2020/06/vejezemiwedonezutobez.pdf
    • https://lilimiweko.files.wordpress.com/2020/06/78713496463.pdf
    • https://woxonoxemu.files.wordpress.com/2020/06/4261168704.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_off000085d8.bin
7a5eeb2730b116ddc172b413ff7b53de1fc70626a88e8636a204e63bf5db03d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D8 11616 bytes

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