Malicious PDF — malware analysis report

Static analysis result for SHA-256 4759df71cf14c9f0…

MALICIOUS

PDF

39.4 KB Created: 2020-05-19 20:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89ced3859f78f73f8e356bac2d3d164 SHA-1: a9df719bd1033ae41728950920f8948b09753809 SHA-256: 4759df71cf14c9f05987a8c8587870be9d56fc3cd777fd1bcd66bd634e279f2e
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains text related to an educational exercise, which is likely a lure. No scripts were extracted from this sample.

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://kenraye.net/uploads/1/3/0/9/130969727/130969727.html#exercice+phrase+verbale+et+non+verbale+6eme
    • http://poweryogaflow.com/uploads/1/3/0/8/130814337/mukalasarozom.pdf
    • http://weitby.eu/uploads/1/3/0/5/130548192/buzuluwazozatevep.pdf
    • http://tjsporthorsesuk.com/uploads/1/3/0/4/130483794/nefexodet.pdf
    • http://olypiandiner.com/uploads/1/3/0/4/130476469/sotugeretikul-gexizimomif-zezapilagiw-vubavamax.pdf
    • http://morrisfamilyfund.org/uploads/1/3/0/6/130604150/girupiwalewip-mapinujezerurez.pdf
    • http://akwan2fo.nl/uploads/1/3/0/3/130323190/628654.pdf
    • http://bensterpropertiesllc.com/uploads/1/3/0/6/130639609/jufujeroxekobifiluxo.pdf
    • http://bpacontractorsme.com/uploads/1/3/0/2/130289722/d74fa34d09.pdf
    • http://hagenstorage.com/uploads/1/3/1/8/131871690/b072c863.pdf
    • http://krisztiansandidge.com/uploads/1/3/1/4/131453807/nomodivizol_rawililefo.pdf
    • http://joshallen.design/uploads/1/3/0/7/130740116/meratixozixoru.pdf
    • http://gigitgleesinenterprises.com/uploads/1/3/1/6/131637226/jeseguvasezuvox.pdf
    • http://tarasnyderonline.com/uploads/1/3/0/2/130289355/lisopov-xenagefib-gudapukinajud.pdf
    • http://chanio.com/uploads/1/3/0/3/130323159/zadefezaz.pdf
    • http://recipeformasala.com/uploads/1/3/1/4/131437434/debfe2282.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_off000067bf.bin
5a2ede7b010868ad08d7fb63b84dc04854c02c358d95eea6a3e5e3f7f0ec229e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 13072 bytes

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