Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55f3e10f7666441…

MALICIOUS

PDF

35.2 KB Created: 2020-06-12 05:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f69af1e36cade9b9e089c47fa2f5f54 SHA-1: e48a023ec0739ba969283cf3ae90bf1ff1ffcf2f SHA-256: f55f3e10f7666441c72fb20035bdb5a5786910fe3706ba9fc6d96e7b3b8aa56c
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text related to 'skin diving lessons' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to a link farm designed to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rayhollenbeckhomeinspection.com/uploads/1/3/1/4/131454452/131454452.html#skin+diving+lessons
    • http://ns2.naema.ca/uploads/1/3/0/6/130604551/sobixolofasa.pdf
    • http://winfielddsm.com/uploads/1/3/1/4/131408298/tivugewojetogugap.pdf
    • http://poetry-is-life.com/uploads/1/3/1/8/131856124/2501026.pdf
    • http://theau.xyz/uploads/1/3/0/7/130739887/883645.pdf
    • http://fisanalyst.fedfis.com/uploads/1/3/0/8/130874289/xufesipeluwepos.pdf
    • http://mx.jannywong-pottery.com/uploads/1/3/1/3/131380828/sufuvovogevo.pdf
    • http://sjhflooring.co.uk/uploads/1/3/1/6/131606127/vezukapu.pdf
    • http://lorrainedidit.com/uploads/1/3/1/4/131453535/wemobuvogeguse.pdf
    • http://hostmaster.premierprescotthomes.com/uploads/1/3/0/5/130551654/344d5247d5b2fa.pdf
    • http://spiritfestfl.com/uploads/1/3/0/9/130969471/52463522e740657.pdf
    • http://mail.gbcpaxton.com/uploads/1/3/0/9/130969220/vajinewujake-fakalaf.pdf
    • http://lashesbyrosie.com/uploads/1/3/0/5/130548152/6431502.pdf
    • http://autismeonderzoek.be/uploads/1/3/0/5/130547552/rolija.pdf
    • http://cardiffcolorectal.com/uploads/1/3/1/0/131070842/8761177.pdf
    • https://poronazedus.files.wordpress.com/2020/06/82732053476.pdf
    • https://sudevoxe.files.wordpress.com/2020/06/pifurexexejozabu.pdf
    • https://kixametozi.files.wordpress.com/2020/06/2929868103.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_off00005ef0.bin
4c84f6a2a58ee454e50b4f29f6312ff06630ca5356ecbe22ef00f1738d7a5985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 10148 bytes

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