Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b107f8f1d28e7f…

MALICIOUS

PDF

36.4 KB Created: 2020-03-30 16:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0324b48071890d59294500134410ec23 SHA-1: 8dab4b6ec9961ef35806072f1e95b5a4b7d94d60 SHA-256: 52b107f8f1d28e7f54314bd16c98f9df4c49719454a8cc93440698c38681112e
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted across various domains, indicative of a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to these external resources, which could host further malicious content or phishing lures.

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://corustest.devsite-1.com/uploads/1/3/0/2/130289587/130289587.html#norwegian+breakaway+deck+map
    • http://enochian.studio/uploads/1/3/1/0/131070710/zubixewewopunudivos.pdf
    • http://bobbicavincounseling.com/uploads/1/3/1/0/131071295/januvaxe.pdf
    • http://maison.boutique/uploads/1/3/0/7/130775786/8701b1db9f69.pdf
    • http://kartri.net/uploads/1/3/0/8/130813855/tamepofex_wubixapuk_jonotokorin_rivabu.pdf
    • http://jacobswellbyron.com/uploads/1/3/0/4/130436218/0c13831d.pdf
    • http://folbl.com/uploads/1/3/0/6/130620544/150408.pdf
    • http://prioritytreesandshrubs.com/uploads/1/3/0/5/130540401/gugagejevop.pdf
    • http://glassonglassart.com/uploads/1/3/1/0/131070331/dd1b9.pdf
    • http://kushyherb.ch/uploads/1/3/0/8/130874691/satizusawu_tepir_vujonamanudaku_nurod.pdf
    • http://taylorbehavioral.com/uploads/1/3/0/8/130814401/widigovavari.pdf
    • http://coolcreativecreations.com/uploads/1/3/1/3/131380181/veropawinexoxilebame.pdf
    • http://michelle-grove.com/uploads/1/3/0/2/130289581/dugata.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_off000062b2.bin
b932ae84dd528869b90af7c54d475379007e284fc124aa6907c73ad670def78d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 8416 bytes

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