Malicious PDF — malware analysis report

Static analysis result for SHA-256 601111f30ab30830…

MALICIOUS

PDF

38.8 KB Created: 2020-03-07 16:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d216b63f571cbaafb78d21973c723075 SHA-1: 473bf71b45bc7110046f570a9b53d97ad1385960 SHA-256: 601111f30ab3083055ae9f64b9099b63ee026b71ee979e9b4a8ef2f0cf961ea0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO spam tactic, potentially used to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://islamophoria.com/uploads/1/3/0/2/130271067/130271067.html#reading+exercises+b2+pdf
    • http://nuditosytrapitos.com/uploads/1/3/0/5/130541384/nopowo.pdf
    • http://webdisk.alamocitygrafix.com/uploads/1/3/0/5/130550758/rezavomibas-wasuwatonu.pdf
    • http://danviet-consult.com/uploads/1/3/0/5/130542863/9369689.pdf
    • http://simplymetering.com/uploads/1/3/0/3/130313700/guvunozidotewafab.pdf
    • http://rocklanddoula.net/uploads/1/3/0/3/130323959/9238231.pdf
    • http://www.zakis-filmtierakademie.com/uploads/1/3/0/2/130270892/2213541f8b93.pdf
    • http://honeyjarspells.com/uploads/1/3/0/6/130639192/wevadutovifasesevovo.pdf
    • http://nongress.com/uploads/1/3/0/2/130289453/bemexilanevilazid.pdf
    • http://michiganreflexology.com/uploads/1/3/0/4/130436096/falux-muriroliwemoxo.pdf
    • http://iqmulate.com/uploads/1/3/0/6/130639679/vezomaj.pdf
    • http://buttonsnmoore.ca/uploads/1/3/0/5/130551890/1220280.pdf
    • http://lbtanner.com/uploads/1/3/0/6/130603760/8972556.pdf
    • http://www.jaehomes.com/uploads/1/3/0/2/130287867/fetokemupexuxejob.pdf
    • http://youngstownchurch.com/uploads/1/3/0/5/130539107/wevofapavanejux.pdf
    • http://mail.artartine.com/uploads/1/3/0/8/130815137/2079990.pdf
    • http://ardadcmicrogrid.com/uploads/1/3/0/9/130969001/2329625.pdf
    • http://newkids.co.uk/uploads/1/3/0/5/130545475/128eb00.pdf
    • http://ns1.taichiathome.com/uploads/1/3/0/2/130270823/9485648.pdf
    • http://santaclaritascreenprinting.com/uploads/1/3/0/2/130272327/xutoma-dimilitedotede.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_off00006f32.bin
7e17b015a53398e921fc823a10c562c8013ba86c0591f2e78b8faee670a5cbc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F32 7848 bytes

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