Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a29a9605c277f4…

MALICIOUS

PDF

105.5 KB Created: 2020-04-07 08:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d9c50c2276dfae221b23ce6c67414b54 SHA-1: 6af3e0435bc4eaa3fbc0013312b253ee2a9a7519 SHA-256: 69a29a9605c277f49ce46c06b8b71328cda13de0d5eb562831e10170017f92b4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on unrelated domains, suggesting a link farm or SEO spamming operation. The ML classifier also flagged this PDF as malicious. The document body contains a phrase about mixed economies, which is likely a lure to disguise the malicious intent of directing users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

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://hospitalityfloorpros.com/uploads/1/3/0/6/130640033/130640033.html#hay+paises+que+poseen+sistema+de+economia+mixta
    • http://mojoactionsports.com/uploads/1/3/0/4/130435795/xisefik.pdf
    • http://apagelectricalandutilities.com/uploads/1/3/0/7/130775129/9453509.pdf
    • http://radiantlifeacademy.org/uploads/1/3/1/4/131437516/lodok.pdf
    • http://jonesemily.com/uploads/1/3/0/2/130270867/xogaf_mibos_gizedoxulo_pubokekojedoli.pdf
    • http://letlaura.net/uploads/1/3/0/3/130323914/jirasowumugetalizu.pdf
    • http://ludwigcluyseart.com/uploads/1/3/0/4/130476978/3483488.pdf
    • http://quicksightdeveloper.com/uploads/1/3/0/7/130739043/4bbc52.pdf
    • http://heavenlydao.com/uploads/1/3/0/9/130969742/desot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014581.bin
ee68657e9f83d5c7b69646b9ef6be6cee51421b804dad42b0335e2b4b67f1a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14581 10676 bytes
font_01_sfnt_off00016a81.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A81 2652 bytes
font_02_sfnt_off000173be.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173BE 4144 bytes
font_03_sfnt_off000180b4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180B4 16036 bytes

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