Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b757dc3e8a4ec1…

MALICIOUS

PDF

46.2 KB Created: 2020-04-04 16:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ac5f09cb7cdaef248a5a0af6cdc0f224 SHA-1: fe430b40dc3886494df9517f974c670062d0bb5d SHA-256: 78b757dc3e8a4ec12cd99d5c0a1d1aa8f6b4ee2abe0b9c2d846feacd3107c4b8
92 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs point to various domains, suggesting a link farm or a method to distribute malicious content indirectly. No scripts were extracted from this sample.

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://millsaviationcharities.org/uploads/1/3/0/6/130639538/130639538.html#el+mundo+prehispanico+caracteristicas+politicas
    • http://seaclifflocksmith.com/uploads/1/3/0/6/130604523/6432450.pdf
    • http://aliveatfiveplymouth.com/uploads/1/3/0/7/130739351/rarere_xewasosulorut.pdf
    • http://popularagents.com/uploads/1/3/0/7/130739756/vawejafinoz.pdf
    • http://bryncurtjameshammond.com/uploads/1/3/0/7/130740046/3963858.pdf
    • http://millstransportation.net/uploads/1/3/0/8/130873855/9a62d3b84.pdf
    • http://orphancaresolutions.com/uploads/1/3/0/9/130969235/jifulitalu_konegebakutamos_kokut.pdf
    • http://aminamediapro.net/uploads/1/3/0/2/130274256/dipodilor.pdf
    • http://e-darcytrie.com/uploads/1/3/0/4/130477448/4b3d19d3d0d4.pdf
    • http://ferryfamily.net/uploads/1/3/0/6/130621709/woxerap.pdf
    • http://afrikproject.org/uploads/1/3/0/8/130873872/gevubinudiki.pdf
    • http://mevsimyalitim.com/uploads/1/3/0/5/130546519/6daa831f30d.pdf
    • http://sundayblogger.com/uploads/1/3/0/3/130323743/kuxowis-pemetaj-sumafepepurin-bobimagu.pdf
    • http://seattleseniorcounseling.com/uploads/1/3/0/7/130739621/difusel_zifalozuzumevo_kenizab_gerinuvepomepok.pdf
    • http://paulburris.net/uploads/1/3/0/3/130379162/5d983555216d8e7.pdf
    • http://waiapukidshomebased.com/uploads/1/3/0/5/130540009/navojelewof-gadaxudime-konud-tobipadu.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_off0000888c.bin
46f0e323a392bc043db3d2faf1b1ad08703dcf0ef442058a8fe2e8756fcf99d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x888C 9220 bytes

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