Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e2a75caf27e3f5…

MALICIOUS

PDF

62.5 KB Created: 2021-09-02 09:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58f13235254fd363682becaa7e7c34b3 SHA-1: 9a2693009e6798f7dac6ca15c9e54a62aa0d077a SHA-256: e5e2a75caf27e3f5c8729a60771f179e91668fa0e4ccecc3062786433874b81e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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://bentleyplemtech.ru/userfiles/file/gasosesizaxifejabel.pdf In PDF document text
    • http://hbleg.com/admin/userfiles/files/19161085032.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/b69d75799093df46e73cf7ed22134605/28299863562.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/9lc13fmlbdgmpn9n90mmrf1ghk/89957666410.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210802150736_lgnpdt.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/98401180099.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607df5acd07a4---27719877969.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/46600815050.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/zefafudopukugutidinapode.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/15963061049.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/26108603743.pdfIn PDF document text
    • https://actorconseil.com/files/file/kufisezij.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/334428189.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/i9j210ugor3a2pocecbel3u4i0/28797878419.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aead8b793c---rumeroturetaxilorul.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/40303438983.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/40550457613.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/nuderiruzonasari.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d80cae0538af772be62f7535ad133de2/karizo.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/8202209814.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6d6440f90426364588288d3b592b7d79/wefopurexa.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/5acf53342aa3608bd8899e7f155d7213/32612603809.pdfIn PDF document text
    • http://www.klccpa.com/userfiles/file/In PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/04f8a0a4900c0fea12d9a9eaf94d23d9/sozudexatusoxumarezewovuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=big+brother+us+episodesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1