Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db5a66067f9d239…

MALICIOUS

PDF

56.2 KB Created: 2021-09-02 23:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 5f64ba8d2fce7c00a14391214ab39e67 SHA-1: 1e0ab9f25fa7ed425e2c2725c33363e55d165ab2 SHA-256: 5db5a66067f9d239adea141f2cc3bcec922e152cac9f1411213f0f058736007f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with exploitation techniques that could lead to client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5856

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://oniceh.ru/uplcv?utm_term=ryobi+drill+12v+manual PDF link annotation
    • http://drkoopman.nl/cmsimages/file/60286657256.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a128ebc37---74168182896.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gedorizo.pdfIn PDF document text
    • https://777mto.org/contents//files/zepobuzekogureru.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/notolutomaj.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/61676791368.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/11qphmd7dfst64asspl91h6jh6/51271188487.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/bfteas2gk5gc0b8pe626ga7js2/9253285169.pdfIn PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/73334304462.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c4f5a248e---jukamobisuteziser.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/7h01kt1fsnoude0k43g3mp3php/52171210378.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/61424915959.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/raposelowopog.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/305rkrrb6rqs62o6u2ojfv8tt3/xajibexuzugafawogafito.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/18983085005.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8521e7b2---jotesimixegi.pdfIn PDF document text
    • http://faradbox.pl/files/file/tuwokosovex.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/wivamarexilafazu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9680362010---38016612925.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612132ff13986---potidigezudewojerelevuge.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c06cafbb6a9---93453953142.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/6b74e0d01d3bec2a7041c6cca3bbc37d/79866245630.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/jiwusadekejedovimuf.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a09ca55753f---48149519324.pdfIn PDF document text
    • http://packamate.com/userfiles/xoxaxisuke.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c52206624---jivikavenizu.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8229bcb3e---21597843595.pdfIn PDF document text
    • 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_off0000ba8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8C 15748 bytes
SHA-256: 889b22432148179b70379b56c9182bdc1b72a543018cdcefc73abe57ad13aa34