Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a82a4b269c5de8f…

MALICIOUS

PDF

37.1 KB Created: 2020-04-10 01:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bd9e5dc26b5347496457672bec54bee1 SHA-1: e08e05f60f9c5906ccc2fd4d46671256fb0bb2fe SHA-256: 1a82a4b269c5de8fe2b757175e5a485e03c78f54f1e4bef0057f3814a4ad32d3
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, as indicated by the 'PDF_SEO_LINK_FARM' heuristic firing. It contains numerous external URLs pointing to other PDF files hosted across various domains. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be the distribution of a large number of links, potentially to manipulate search engine rankings or to serve as a distribution point for further malicious payloads.

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://live4todayusa.org/uploads/1/3/0/4/130476940/130476940.html#carta+psicrom%C3%A9trica+carrier
    • http://myneurohub.com/uploads/1/3/0/6/130604044/964710.pdf
    • http://golivebeautiful.com/uploads/1/3/0/6/130639418/vomisototixin-rubozipepepolep.pdf
    • http://thechromaticchetwilliamson.com/uploads/1/3/1/0/131070213/734820.pdf
    • http://northamptondowntown.com/uploads/1/3/0/3/130323928/nuwikuxopabumojur.pdf
    • http://thesupporthelp247.com/uploads/1/3/0/5/130589070/wezuvolubawi.pdf
    • http://libbysdance.com/uploads/1/3/1/4/131454029/6291968.pdf
    • http://witheysclass.com/uploads/1/3/0/6/130604452/3478258.pdf
    • http://pasadenaapplianceservice.com/uploads/1/3/0/6/130639472/ffd032838839d.pdf
    • http://halliebezner.com/uploads/1/3/1/6/131606575/juwamurow_wotudarobupuxe_timetufezoko_jubopidonak.pdf
    • http://haleyshandmadeco.com/uploads/1/3/0/6/130639935/8264251.pdf
    • http://leswati.com/uploads/1/3/0/8/130813037/mituzuponapu.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_off00006684.bin
026aa9cfdffdf8bb3af13bbc9bef922bfd4bd0d78139f8d1172c363ed42b47ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 8240 bytes

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