Malicious PDF — malware analysis report

Static analysis result for SHA-256 75595239121b13bb…

MALICIOUS

PDF

35.8 KB Created: 2020-04-01 19:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f03f01d0a59656e484d8f5296d3849b SHA-1: 7011acafdd7f7312e8f816028bd5e0bf2d40ff04 SHA-256: 75595239121b13bb9ca0cd91b7af583f7e5eff9f8a17ac244d7d26c82adfbd94
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or content distribution scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. The document body appears to be a mix of obfuscated text and URLs, further suggesting a malicious intent to direct users to external resources.

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://morethanjustaface.nl/uploads/1/3/0/8/130814340/130814340.html#calentador+solar+solar+10+tubos+foset
    • http://thefancychicken.net/uploads/1/3/0/2/130289229/7941393.pdf
    • http://xoglamaccess.com/uploads/1/3/0/2/130273846/fexasine.pdf
    • http://ttcclassics.com/uploads/1/3/0/9/130969317/1204624.pdf
    • http://allaboutairheatingcoolingsolutions.com/uploads/1/3/0/6/130639423/123de64.pdf
    • http://gpiadvisor.org/uploads/1/3/0/5/130590096/raxiwulu.pdf
    • http://australianthermalimaging.com/uploads/1/3/1/0/131069859/1021865.pdf
    • http://xileart.com/uploads/1/3/0/6/130604860/nurovodoxo.pdf
    • http://buildasistaup.com/uploads/1/3/0/4/130488483/a506d175e.pdf
    • http://cletusryan.com/uploads/1/3/0/6/130620565/fibizedogijajodinada.pdf
    • http://www.directactionfilm.cahabanewmedia.com/uploads/1/3/1/3/131384024/1c2c98b78.pdf
    • http://helideckcertification.org/uploads/1/3/0/6/130604379/8571368.pdf
    • http://mlroyceindustriesllc.net/uploads/1/3/0/6/130605168/1416855.pdf
    • http://fusion-subpi-mandarin.com/uploads/1/3/0/7/130775587/xosewovunedabe-korejemojo-dijuge.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_off00006045.bin
c010404fd643cbeda8da435098b325e7340ce9ac45fdebd46e5b2d1ee06ae898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6045 8956 bytes

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