Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae400632dc40110d…

MALICIOUS

PDF

70.6 KB Created: 2021-05-05 10:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0d965734a113f01257f63bdac70741 SHA-1: 97a9d4498fe5d2b7f0a2cf6570761e9904f79e6b SHA-256: ae400632dc40110db72620844a16b9d374353a0931ac07675578df192a6be114
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using compromised hosting for distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16073d41d91a68---pevavidapogubuwupej.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/hmr962vjb5v9dqbq4temj9ovlh/mufadiponiwuxas.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8d7cd7a62---39653185462.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3796496c1---witaritadupuju.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b682a09b---xupijaj.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1a0a356123bec3e34212142cb855882f/12264122454.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a791f2b0ba---11939194094.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/balodeb.pdf
    • http://alemotta.com/resources/original/file/97298224482.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/46460117074.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/43f69b40e93a4fd2caff27304091e600/xulawofotu.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d275e94e63f64905ede0ae153061d1ea/lelazumerezimugukavova.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/652032e10bcd20c397bb6e0715a7c951/44886104110.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607829a65719c---79364788298.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/41530319412.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/cc5obtk2moulf77da5tul6q8f3/61518469051.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/1c20026215403bc396d803aac7a4f70f/potetureg.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba9030fab2---bewesefito.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5908163d3ed99f6bb89e2470024095bb/82634403944.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=job+interview+waiter+answers
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef60.bin
a294c209319c5b003f4aa2765e5bb155ea03f2b73d411ccd59a972bba5b7c0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF60 4716 bytes

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