Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c69d3104ae932c…

MALICIOUS

PDF

70.7 KB Created: 2021-09-03 17:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 180bfb01780db485feb23303d6e090ed SHA-1: ef62992e43cb47a36cf337acdcb78c79dcb4ce73 SHA-256: d0c69d3104ae932c9a643088268ef372d3126a9d34f7668fe1cf40eaf8ffa72b
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm to distribute or host malicious content. The embedded URLs and link farm structure strongly suggest an attempt to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

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://eclearusa.com/images/file/25970803309.pdf In PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/dinujunujinogud.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/rijox.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/tixogizajusonet.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/telobajuzopiwu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/r6vps0u1n8inm32p9t5js8usq7/62567241227.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/2gkqgc6v3eam204g3uc6gdvlg7/8526565916.pdfIn PDF document text
    • https://advik.net/userfiles/file/39044999237.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/58628641436.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/jopagilonivozifivunaror.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/jolazajolerekalasawavu.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d846ec19586---posiligefene.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c4f26041c---puzobibavarom.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f046c66944---mewewibevinorelinorenepe.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/49020044221.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/85607513462.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/50843188539.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607319da39baa---53303092913.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ebjn2b5rd8orst07c1ql9ncc5i/22506630977.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608582fed2191---jonupepesijixafudeduvavib.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/peluvalikagudus.pdfIn PDF document text
    • http://remobudostol.pl/pliki/49677427270.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/22922325156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=guitar+chords+book+pdf+free+downloadPDF 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_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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