Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbfefdd9cbe281f…

MALICIOUS

PDF

68.1 KB Created: 2021-07-08 07:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 23ff0f99f443f8aade5abbf8f3448fb7 SHA-1: 65b64acc8e4cf673a60943a5530fa2f54a3c1f10 SHA-256: 1dbfefdd9cbe281f15a2feda5ab9521e51347854fd0a85c97d291ea6848a86d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these links are likely used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further supports its malicious nature, likely as a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6323

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607b589bddc0d---xotunet.pdf In PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/1ce9b9977f4fbc6fdb8678525fc19970/gudajuduwo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b4d95c1cf0fb51cfd7a0434ba6e8498d/zolixumovifuvimipe.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc74bb20f8---jujefipid.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/67242286281.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/sodarebasime.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/76aa9d87748c1bb5500dee94a569539e/29823438548.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6d9a86509ba98b73aee1f71d0438ebe4/supigojiruzevufubadose.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/15394380199.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/f32c73c92975d5511b65372613d567e0/taxutovome.pdfIn PDF document text
    • http://hzqzg.com/d/files/14970425690.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24fa640c9---katebajuvebefo.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/39241357023.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/55517711446.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/22255534504.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d800a9b49---33163252826.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/kiridumumutir.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608436472de7a---68392069135.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/gigibowu.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/90463939724.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/rezirimavu.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/7007e413785d454632a7dd55d689a8c4/nazatov.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca9ad80a2c---baxifesulupupan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=oneness+in+marriage+bible+versesPDF 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_off0000e942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 17232 bytes
SHA-256: 1a32ef0279fd6e268b8435fee9b51de404b95909ea78f711be309b612db693e7

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