Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcee930b189309bd…

MALICIOUS

PDF

39.6 KB Created: 2020-03-12 04:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b291c75b2b2a63b2cefd224331271657 SHA-1: f7254a8d868cf18376f99fdb43864336fdb74882 SHA-256: fcee930b189309bd08fe2a5b833d8ae0461a02e591a9e04bd1937bdecfb31e64
92 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary link points to a lure document related to Microsoft Excel, suggesting a social engineering tactic. The ML classifier also strongly indicated maliciousness. The embedded links are likely used to redirect the user to malicious websites for further exploitation or malware download.

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://wcd-wbjrziop.mgh-r.ch/uploads/1/3/0/4/130490386/130490386.html#microsoft+excel+2011+data+analysis+toolpak
    • http://briangabel.com/uploads/1/3/0/6/130604820/3647e84.pdf
    • http://myrachelnewman.com/uploads/1/3/0/5/130589402/4550053.pdf
    • http://tasnimshamma.com/uploads/1/3/0/5/130539054/fososakuxotemowefe.pdf
    • http://fantastiques.co.uk/uploads/1/3/0/9/130969628/dufutudodubol-zufevij-zoxijulidumo.pdf
    • http://www.peinture-sculpture-gravure.com/uploads/1/3/0/4/130489536/bakusamepesaper.pdf
    • http://www.fortwaynetreeoflifeplacenta.com/uploads/1/3/0/3/130379254/sasanulude.pdf
    • http://mx.ouverturetorino.org/uploads/1/3/0/5/130588377/7105e131.pdf
    • http://www.bedfordunitedchur.com/uploads/1/3/0/3/130312986/891946989f513.pdf
    • http://mrfleischer.com/uploads/1/3/0/5/130544447/poletafuxiwaxuz.pdf
    • http://scottbrackenridgebuilders.co.nz/uploads/1/3/0/8/130813373/4141002.pdf
    • http://hospicehangout.com/uploads/1/3/0/4/130488470/4414425.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_off00007227.bin
459d951de6a5c72a41a1eb8d85c9c16ef7b1dd4e43f246fc787162030b870db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 7968 bytes

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