Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbf52c64d487887…

MALICIOUS

PDF

41.9 KB Created: 2020-04-12 05:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 04f8ec5fa6204d45fb5adf34b0895964 SHA-1: 01a85f9c3198dce9217f2461cd55417c62b8f41c SHA-256: 7bbf52c64d487887bc14d0d2f87c10ca1118949e8e25db4b60bfea84c7b17c56
92 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample, limiting the analysis of direct payload execution.

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://atasteofjamaicaandmore.com/uploads/1/3/0/9/130969724/130969724.html#harvest+moon+friends+of+mineral+town+walkthrough+walls+cheat
    • http://hofladchen.de/uploads/1/3/1/3/131384249/928324.pdf
    • http://buycialis.com/uploads/1/3/0/5/130588675/d5a1ec5edd3.pdf
    • http://pamclasbydesigns.com/uploads/1/3/0/5/130589042/konuvodagefupe-sejotuzet.pdf
    • http://petergillieslaw.com/uploads/1/3/0/4/130490875/raruvagexurelegopag.pdf
    • http://flutterbeautybarmke.com/uploads/1/3/0/6/130604446/xegomi.pdf
    • http://ps5grip.com/uploads/1/3/1/4/131438709/sanakidujejiw.pdf
    • http://grupodular.com/uploads/1/3/1/3/131380606/355e07cb.pdf
    • http://www.danishvillagekringle.com/uploads/1/3/0/6/130604054/bemisixabawasag-muwabudilo.pdf
    • http://recyclewithseanluca.com/uploads/1/3/0/6/130620848/wasidepuka_palevuxad_zukitifozi_pigezegigotaj.pdf
    • http://mossiepawspetmassage.com/uploads/1/3/0/3/130313539/af3b2b6e3c.pdf
    • http://chatsaubain.be/uploads/1/3/0/5/130544539/kesikituxudema_sapitalewubu_kejuno_jopesex.pdf
    • http://burnsbradshawllcrealtors.com/uploads/1/3/0/7/130775651/5572b0208f3d0.pdf
    • http://flutterbeautybarmke.com/u
    • 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_off00007c01.bin
9ad601aaa0ecf5806770c02c5c56ec8f1591d8e81fb0dfb51d545fae67fc6080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C01 7988 bytes

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