Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53e696066861ecd…

MALICIOUS

PDF

32.9 KB Created: 2020-06-05 02:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa5c0b38215761ec2435759598b3c00 SHA-1: a7787eada6f4a0e50e613d267c7c59d46b2d5fb8 SHA-256: a53e696066861ecdd08ee308c5d37deb02d1a49d789ac1ec31739f72d9f37cca
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially obfuscated, contains references to these URLs. This indicates a likely attempt to direct users to malicious or SEO-manipulated content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://host139.carmichaelnl.com/uploads/1/3/1/4/131453784/131453784.html#la+loba+del+mal+el+coyote+y+su+banda
    • http://sisuwoodwork.com/uploads/1/3/0/2/130288600/modonetenug-rosifepava-gomawenibati.pdf
    • http://mta-sts.mx.serenamariewilliams.com/uploads/1/3/0/4/130476188/maveviwe_nekoki.pdf
    • http://thymeisonmyside.com/uploads/1/3/0/6/130605259/974c7e3a65019.pdf
    • http://doctorsagesblog.com/uploads/1/3/0/2/130287973/rajid.pdf
    • http://buttetrucks.com/uploads/1/3/1/4/131438114/goninuladotozofesex.pdf
    • http://searchandrescueireland.com/uploads/1/3/1/3/131380470/siwodiropomelo.pdf
    • http://insurancedirect123.agency/uploads/1/3/0/4/130483886/5213526.pdf
    • http://gscareers.com/uploads/1/3/1/3/131380052/6101171.pdf
    • http://host139.carmichaelnl.com/uploads/1/3/1/4/131453784/terms.html
    • http://host139.carmichaelnl.com/uploads/1/3/1/4/131453784/dmca.html
    • http://host139.carmichaelnl.com/uploads/1/3/1/4/131453784/policy.html
    • https://xenumozuzisa.files.wordpress.com/2020/06/5207758055.pdf
    • https://wizubuvore.files.wordpress.com/2020/06/15553595254.pdf
    • https://mirexudokof.files.wordpress.com/2020/06/duxukaxubuwofaxalijoj.pdf
    • https://segemabo.files.wordpress.com/2020/06/38294061980.pdf
    • https://fukubosar.files.wordpress.com/2020/06/98097650443.pdf
    • https://mudilafizusa.files.wordpress.com/2020/06/xatubezajesuwowiteso.pdf
    • https://rutefiferali693506352.files.wordpress.com/2020/06/83082734736.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_off000053e1.bin
e05447901e3db94faf7bad90336851e7fcbd2ac3ecf2d05c928ad471efa9bcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53E1 10448 bytes

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