Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc6f9a620788c29…

MALICIOUS

PDF

34.9 KB Created: 2020-06-03 14:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bec47998de859f45e7d9ce9730d5e51 SHA-1: 0770d7a48585c2b9a571684d2ac81c58f9b3da47 SHA-256: 5cc6f9a620788c292e310758c4de549344723392b816e650ea28ce6182e0dca6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, characteristic of a link farm designed to attract traffic and potentially distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of many external PDF links suggests an attempt to redirect users to harmful sites. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent to lure users into downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://system.theoutreachmovement.org/uploads/1/3/1/3/131382808/131382808.html#libro+hablando+sola+para+descargar+pdf+gratis
    • http://radsfoundation.net/uploads/1/3/1/3/131383931/bc826162d069d.pdf
    • http://goabvi.com/uploads/1/3/1/0/131071295/1576235.pdf
    • http://spanotec.com/uploads/1/3/1/8/131872155/5038139.pdf
    • http://woflglobal.info/uploads/1/3/1/4/131405997/pexiloxelanubavaxesi.pdf
    • http://cpanel.traditionswealthadvisors.com/uploads/1/3/0/4/130477541/vefozupi.pdf
    • http://openingtopassion.com/uploads/1/3/1/4/131406082/3698379.pdf
    • http://smokeytopazjazz.com/uploads/1/3/0/2/130289636/dajejomula-motirowivix-gilez.pdf
    • http://system.theoutreachmovement.org/uploads/1/3/1/3/131382808/terms.html
    • http://system.theoutreachmovement.org/uploads/1/3/1/3/131382808/dmca.html
    • http://system.theoutreachmovement.org/uploads/1/3/1/3/131382808/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fokofalur.files.wordpress.com/2020/05/murugagesi.pdf
    • https://texufugibat.files.wordpress.com/2020/05/xurawiv.pdf
    • https://bametip.files.wordpress.com/2020/05/24525691221.pdf
    • https://renefekuxa.files.wordpress.com/2020/06/ketajumut.pdf
    • https://liwibemog.files.wordpress.com/2020/06/59057784878.pdf
    • https://jededoxi.files.wordpress.com/2020/06/95092464306.pdf
    • https://rogosewilut.files.wordpress.com/2020/06/9559046785.pdf
    • https://lorimanugolu303520256.files.wordpress.com/2020/06/nokuwatavowewuvideme.pdf
    • https://lomifaka595990757.files.wordpress.com/2020/06/zodofa.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000592d.bin
4ad22aa672649ada1b343f2be0ff27bd1f54d57ef47dfd44ce0ed77b00923b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x592D 11220 bytes