Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c71d1ce8fc07134…

MALICIOUS

PDF

39.1 KB Created: 2020-04-22 08:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bb3790e5beaf712b4bcb816df4e506cb SHA-1: 60604ecfb9530528889ab0b2faf7fe03a36ae0ae SHA-256: 1c71d1ce8fc071344e15f8cd4f233a53727d3002b44022d699160ca88f493a56
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains. The document body text mentions 'College admission form template word', suggesting a lure to entice users to click on the embedded links. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to manipulate search engine results or distribute malicious 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://rznrecording.com/uploads/1/3/0/5/130546434/130546434.html#college+admission+form+template+word
    • http://aomari.info/uploads/1/3/0/7/130776616/5993550.pdf
    • http://unwind-bbco.com/uploads/1/3/1/6/131637873/wewiz-pibilejowumatu-panig.pdf
    • http://timbercreekcustomhomesga.com/uploads/1/3/0/4/130477829/dapuge.pdf
    • http://carestestsite.info/uploads/1/3/0/2/130289002/5245166.pdf
    • http://zoominrealestatephotography.com/uploads/1/3/0/6/130639709/joduvukoj-lefurapigiwibom-lojusarex.pdf
    • http://lbirestaurants.com/uploads/1/3/0/7/130739596/d2106bd.pdf
    • http://falezahsap.com/uploads/1/3/0/5/130588435/1071843.pdf
    • http://connienicholsonart.com/uploads/1/3/1/4/131438113/kalutika-virowuvotu.pdf
    • http://purelespas.com/uploads/1/3/0/7/130739261/dizomepow-rewimovixap-vagup-ruvusogev.pdf
    • http://demandrelief.com/uploads/1/3/0/6/130604477/zajuxes_rivijeturuvo_kosuxezuki_wofavirew.pdf
    • http://nbtatco.com/uploads/1/3/0/5/130551226/jitugif.pdf
    • http://rhettiehq.com/uploads/1/3/0/5/130547999/b0c8d2bc.pdf
    • http://myautismunderstanding.com/uploads/1/3/1/4/131406608/texejegimi.pdf
    • http://mdcannacrawl.com/uploads/1/3/0/2/130287883/kugejuga.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_off00006fbc.bin
cab648b7c15154e8863c582e044e7b64e0551fa14ea3586538735dd5c7a99e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBC 7872 bytes

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