Malicious PDF — malware analysis report

Static analysis result for SHA-256 97641a90bb3719ea…

MALICIOUS

PDF

55.0 KB Created: 2020-06-07 08:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3dd557afb2f11793fd8fe6b661ede7 SHA-1: cdf3c876a97263950a00d123a50fee96eb0049b1 SHA-256: 97641a90bb3719ea6756b23d85832f36bfc131d630befa81dab6adb8f14f7853
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, http://2uc.undesirable.us/uploads/1/3/1/1/131164417/131164417.html#r.c.+pro-am+nes+rom, is directly embedded in the document body. This suggests a tactic to redirect users to potentially malicious or spam-related content, possibly for SEO poisoning or to host further attack stages.

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://2uc.undesirable.us/uploads/1/3/1/1/131164417/131164417.html#r.c.+pro-am+nes+rom
    • http://safewithmenow.com/uploads/1/3/0/4/130483479/waboji-jesakazebal-finogev.pdf
    • http://prenissinternational.com/uploads/1/3/0/6/130639116/028cca8ad7ebe2.pdf
    • http://kildaredesign.com/uploads/1/3/1/4/131453355/dikivarotojugus.pdf
    • http://escaperoomenthusiast.com/uploads/1/3/1/4/131454155/xemiginopafen.pdf
    • http://evejeanetteblohm.com/uploads/1/3/1/4/131437648/3976718.pdf
    • http://autodiscover.ourscienceclass.net/uploads/1/3/1/6/131606055/dazezuraj-futexefare-vejofiwedaw.pdf
    • http://mta-sts.mail.schuletriemli.ch/uploads/1/3/0/5/130589250/lobizuri.pdf
    • http://familiadiesa.com/uploads/1/3/1/4/131454264/sasixuwope-rirugaxuwopas-boferel-monotexisamap.pdf
    • https://sarekuxiwaz591622790.files.wordpress.com/2020/06/50222243903.pdf
    • https://janobavedale.files.wordpress.com/2020/06/zasowudubebafexexu.pdf
    • https://nixinudive.files.wordpress.com/2020/06/95786679596.pdf
    • https://tuponizozu.files.wordpress.com/2020/06/kijamosiregak.pdf
    • https://wexuzofiguxa.files.wordpress.com/2020/06/88360747535.pdf
    • https://timowasufu57836677.files.wordpress.com/2020/06/degujexapaweginipifi.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_off0000abe7.bin
a6b87d7ba084c16b56a36c8086146ef62e28bd97c47b0be72e5d327d252c66dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABE7 10828 bytes

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