Malicious PDF — malware analysis report

Static analysis result for SHA-256 f040ac697bc3e084…

MALICIOUS

PDF

39.1 KB Created: 2020-03-29 06:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b04dc137d1e639d9258ee104428cba0c SHA-1: c62fd82d0d912c474302ae2a01876bc526687903 SHA-256: f040ac697bc3e08439ed33eb2043b9a808082083039b373f2cf5895d1e371231
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, suggesting a link farm or SEO spam campaign. The ML classifier strongly indicated maliciousness. The document body contains a lure related to 'Assassin's Creed Black Flag' and mentions 'treasure map', which is likely a social engineering tactic to encourage clicks on the embedded URLs. The primary attack pattern involves directing users to a multitude of external PDF documents hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://clucktruckportland.com/uploads/1/3/1/3/131383269/131383269.html#assassin%27s+creed+black+flag+elite+harpoon+treasure+map
    • http://presentationy.com/uploads/1/3/0/4/130479570/mudatigipife-bumodo-fexiseler.pdf
    • http://khanpurcrickettournament.com/uploads/1/3/0/3/130379049/6547827.pdf
    • http://timothydlthompson.net/uploads/1/3/0/7/130776747/wuwolasoxan.pdf
    • http://alaawwii.com/uploads/1/3/0/8/130874210/c3dc517.pdf
    • http://sapienlifesciences.com/uploads/1/3/0/8/130873989/4627054.pdf
    • http://lakeviewbike.club/uploads/1/3/0/6/130639438/9f7207b8575b2.pdf
    • http://ecosource.co.uk/uploads/1/3/0/6/130640179/venigijosajuzaxox.pdf
    • http://www.lktaylordesign.com/uploads/1/3/0/6/130621946/kowipuso-felojakojugeto-pupozelekezo.pdf
    • http://love-in-the-afternoon.com/uploads/1/3/0/4/130489706/lidix-zurowisarix.pdf
    • http://plomberierivesudmontreal.plomberiesmith.com/uploads/1/3/0/6/130621179/lirozagazifaximok.pdf
    • http://frontlinefordogs.net/uploads/1/3/0/7/130775748/810927.pdf
    • http://cannapetmeds.org/uploads/1/3/1/3/131398157/wupupuwo_kikesanojudujow.pdf
    • http://psenergy.de/uploads/1/3/0/7/130775223/4fae94bfad4f51.pdf
    • http://gt-autos.com/uploads/1/3/0/3/130324324/8493704.pdf
    • http://www.rootofthebody.org/uploads/1/3/0/5/130540437/vumolav_rumerubokokos.pdf
    • http://4maryh.com/uploads/1/3/0/4/130477201/f4ce0a9.pdf
    • http://nu1912.org/uploads/1/3/0/7/130775630/d634ce8.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_off00007096.bin
6876126fc5a011a1bbed156edaa35b0b4a8bf8c8177a819262b0ac3b67128bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 7680 bytes

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