Malicious PDF — malware analysis report

Static analysis result for SHA-256 892c14364523c586…

MALICIOUS

PDF

43.4 KB Created: 2020-06-22 19:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e81710a022fd2f9b622ca455eda06ada SHA-1: 279a37aa025232b58baa354be49f6f529b366d90 SHA-256: 892c14364523c58612cf7f19b92b99a274371fe5dcbed77dcc412174117a9ed2
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to other PDF files hosted on unrelated domains, suggesting a link farm or redirection mechanism. The document body, though partially obfuscated, mentions 'Tv guide disney channel uk' and includes a primary URL that also references TV guides, indicating a lure to entice users to click on malicious links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://brickthis.net/uploads/1/3/0/3/130324390/130324390.html#tv+guide+disney+channel+uk
    • http://newenglandbabywearers.org/uploads/1/3/0/6/130620853/tajabazadelok.pdf
    • http://waggingtailsproject.org/uploads/1/3/0/5/130543743/forelufo.pdf
    • http://webdisk.cobblertechnologies.com/uploads/1/3/0/6/130621819/387748be617b0.pdf
    • http://mta-sts.mx.charterbusrentalservice.com/uploads/1/3/0/7/130739945/gadademoz.pdf
    • http://sjspreunion.com/uploads/1/3/1/0/131070011/sulibazila_detolerinakiw_lovaf.pdf
    • http://shreveportpoolcleaners.com/uploads/1/3/0/6/130639535/51935c5f6e4.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f0.bin
3b944045acd389294d60c94cf1c4ee34fb20d3f35831ef3bfa25125d2de3040f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 4972 bytes
font_01_sfnt_off000076d6.bin
5f7c0110977594cc427e9f75fb27dd653f55f3b8c077acb65c8ac6161bbde234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D6 12012 bytes

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