Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed047476840dd92…

MALICIOUS

PDF

38.1 KB Created: 2020-03-07 23:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ca5f28304bbcd267d8295793304fae0 SHA-1: 73749621c845a9d05cced2db653c436cc3deaf3f SHA-256: 4ed047476840dd924b62c1e27ff967f229acd386c852d59b9f78794a4e058cbb
92 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The primary URL, http://cvayn.bpmtc.com/uploads/1/3/0/2/130288421/130288421.html#typhoid+vaccine+needed+for+vietnam, is presented as a lure. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed to redirect users to potentially harmful content.

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://cvayn.bpmtc.com/uploads/1/3/0/2/130288421/130288421.html#typhoid+vaccine+needed+for+vietnam
    • http://www.lanotarynearme.com/uploads/1/3/0/3/130323762/1957989.pdf
    • http://www.kittoconsultancy.com/uploads/1/3/0/2/130287285/1936789.pdf
    • http://bbq4hope.com/uploads/1/3/0/6/130621846/22738.pdf
    • http://www.clairegregg.com/uploads/1/3/0/9/130969436/xekogemuroji.pdf
    • http://equalitythroughthelens.com/uploads/1/3/0/6/130620278/5912339.pdf
    • http://zuihaodeyulehuisuo.br3h.com/uploads/1/3/0/5/130543053/3190350.pdf
    • http://eterprai.com/uploads/1/3/0/5/130589362/rufitazin.pdf
    • http://terriddesigns.com/uploads/1/3/0/9/130969300/suzaxomanelarisodi.pdf
    • http://www.triwholehealth.com/uploads/1/3/0/5/130550911/3313080.pdf
    • http://dhvaniwedsvimal.com/uploads/1/3/0/6/130620902/1899874.pdf
    • http://spain-architecture.com/uploads/1/3/0/4/130435646/waxivuligi.pdf
    • http://simplybiblestories.net/uploads/1/3/0/8/130874426/xiraxilaj_turokujugeni.pdf
    • http://mx.duocantoijurko.com/uploads/1/3/0/2/130274166/f80347fa.pdf
    • http://cardigancommuter.com/uploads/1/3/0/4/130483193/zurujusegozuvamugade.pdf
    • http://ecogreendogbeds.com/uploads/1/3/0/5/130550884/166849.pdf
    • http://emilytiberio.com/uploads/1/3/0/7/130739826/ae69b5e12.pdf
    • http://webmail.annekawalker.com/uploads/1/3/0/6/130604556/3d1050748.pdf
    • http://webmail.serendipiteorganiques.com/uploads/1/3/0/6/130621195/4f7f83bc5a.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_off00006d21.bin
4351f365c45b9692f7dd7515abc9d3aebdfba9fc2f4cbcb55469696cf914b8f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 7756 bytes

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