Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b360d1a0a105a90…

MALICIOUS

PDF

35.6 KB Created: 2020-05-15 04:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e84b5fdf08e929f829fb2558827fbb8 SHA-1: 54e5202b3f34c1112bbc546e612190105957ca84 SHA-256: 4b360d1a0a105a9009b92677aa6c024779af3ea618f673da1b53e749f357d5d2
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO abuse tactic. The document body mentions 'Playing card game app' and the presence of numerous external links indicates a lure to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://sherrys-boutique.com/uploads/1/3/0/5/130545885/130545885.html#playing+card+game+app
    • http://20time2create.com/uploads/1/3/0/5/130543980/ramulapafofudaf_mivaxe_guxevovaliwig.pdf
    • http://bigmikefangman.com/uploads/1/3/1/6/131636922/diteno.pdf
    • http://davidstolen.com/uploads/1/3/0/6/130620955/c530e.pdf
    • http://utopiasalonspaboutique.com/uploads/1/3/0/4/130476804/luzuxojipamepulil.pdf
    • http://ellenfowles.com/uploads/1/3/0/6/130621579/muvodoposeral.pdf
    • http://fjdtech.tv/uploads/1/3/0/2/130273626/c9f45121f2b.pdf
    • http://birthingintentionally.com/uploads/1/3/0/6/130621228/c986bc.pdf
    • http://onlinecontactcentersrv1.com/uploads/1/3/0/6/130604031/1347068.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_off00006023.bin
772391e3c663b24dec6c2f75ce2c067839f5284605cc0e95f4e42a9c76a4750b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 10548 bytes

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