Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92a74003c2d6fce…

MALICIOUS

PDF

47.6 KB Created: 2020-03-08 11:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a684aeb1ecbc08b54c3c03e7898fd7a0 SHA-1: 969cb9c4d5c8723e1b8c7caf7af8091a42ec1e71 SHA-256: a92a74003c2d6fce8f7c6825128f01099f4ed475fbcd467b8aa7731870f75d3d
92 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique commonly used in SEO poisoning and link farm attacks to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are also present in the extracted URL list, reinforcing the malicious intent.

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://vps4-boss.pleasingfood.com/uploads/1/3/0/5/130544746/130544746.html#augustan+age+in+english+literature+in+hindi
    • http://paulberryhillsgallery.studio/uploads/1/3/0/2/130272081/a4a7053.pdf
    • http://ctshakerfurniture.com/uploads/1/3/0/6/130639903/diboragepew.pdf
    • http://mail.fhglory.org/uploads/1/3/0/5/130540211/nuwage.pdf
    • http://websitedesign-norfolk.com/uploads/1/3/0/5/130588921/jiwuxupixogimuzovoga.pdf
    • http://improvwork.com/uploads/1/3/0/7/130775297/norenided.pdf
    • http://specializededucational.org/uploads/1/3/0/5/130551464/latuneju.pdf
    • http://www.clarinetmeetsguitar.com/uploads/1/3/0/2/130270836/8a47fb409096a46.pdf
    • http://www.cairokhanhotel.net/uploads/1/3/0/6/130621654/gemejaxogo.pdf
    • http://universalusedautopart.com/uploads/1/3/0/6/130603852/6610269.pdf
    • http://livevideostream.nl/uploads/1/3/0/6/130639270/6633605.pdf
    • http://aromacaferestaurant.com/uploads/1/3/0/6/130604919/motenurinafulig.pdf
    • http://neutralskincare.com/uploads/1/3/0/4/130483207/sapewupub.pdf
    • http://www.hackneycooperativechildcare.co.uk/uploads/1/3/0/8/130814112/d2d3faab.pdf
    • http://getbks.com/uploads/1/3/0/7/130739980/dewumopavama_zazasumub_kukadipisu_dabine.pdf
    • http://greatdentalwork.com/uploads/1/3/0/2/130289585/50b0b3ff1ff.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_off000090f0.bin
e4a80d97c420a9693aa6233c4485afa3783de580895b2fd3d3cb943d141e1102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F0 8348 bytes

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