Malicious PDF — malware analysis report

Static analysis result for SHA-256 15333152173d729b…

MALICIOUS

PDF

134.6 KB Created: 2021-08-04 13:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c199ab3ed6966f96b918d3456d2c8b7e SHA-1: e914372e5557ebe3a2f7a6f6f889b0b782fe21ce SHA-256: 15333152173d729b1a338408dfdf0031cf9df00afdbe4c53c477dd813935d2cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to compromised WordPress sites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8546

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 http://ekolojikweb.net/upld/userfiles/file/88610526602.pdf In PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896c388219b---fezopilidepisifi.pdfIn PDF document text
    • http://nktrading.qa/file/files/nazasigotojejafoderojari.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb703dfd2---guxobixogodiv.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a465266d1c1---jofutokadazitaligijig.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/sojedenom.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/32142785473.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/bue0j05r6da5kjbmd5s383kk1r/jexowa.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/fogarotasidenawexekux.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/wamupo.pdfIn PDF document text
    • http://serting.eu/userfiles/files/88490845568.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9218cad410---67638467896.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/lifab.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/59059339503.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/bbb23a056cc2f985fcf789141206d7ff/96669168314.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084aba36fe31---sameweteserinesufurajaw.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1b5ce2936ef26b2d5740fab3a9837758/sinomokapadijikareluko.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/27862162817.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/97a34fa26d084d06155ded052044e9e9/62678152815.pdfIn PDF document text
    • http://iccarrentals.com/files/file/pisifetiminisajokimulek.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/rlhtj7gouf0d2hpif6t0p03ne0/40282726370.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/09ccf20d6e8a128b57be7bcd179f4ded/33781752569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=what+is+gothic+revivalPDF 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_off0001eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EACF 22624 bytes
SHA-256: 3a418040f20cd6eb4f0506b98cc9f251dbd5234f6fdf3c9df9b59ffcc510fd53

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