Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73e0eaae7793df3…

MALICIOUS

PDF

67.0 KB Created: 2021-08-20 13:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f8363b59adf902e579b4a1311db8e3a6 SHA-1: b5f3ba44245d36d9030ef2f6e2fc32e672b8b80a SHA-256: e73e0eaae7793df3a4b55ac88b5030dc99807b845a7e06b8a262d26801e54601
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9500

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 https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/55d5411ec92286c7ef9123c4409c0682/femopofukumujev.pdf In PDF document text
    • https://beauti-full.ru/uploads/files/kirowum.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/gevosukefufakubovexano.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080c441da2ea---8145529387.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/88cd73f8a37953fc6720b8cb43b3c038/nitikimesonux.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/fae6d9844efffeb4718a2bbb9e1413ff/68634018300.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/t6u3s9se44qtfas54rjb1olsnj/98958103451.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/0ce8fd70d779421d08d41821e6d974da/riwisiderasivagabataveta.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/xumeg.pdfIn PDF document text
    • http://sam-global.info/files/file/balevano.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7fb90e87a---6851622331.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/9uiehpl0u1t7mvpgc6fei14t7f/20721400309.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/df40e9ae1b42decddc75b73176d1a96b/bezemidux.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af86ba386b7---47426761198.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/28763547964.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/64678454572.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/zosefevadudumoxunat.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb7d73bdca---lipunimarebaporadalusi.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773bc44b061---82979906351.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/sebagiwalabe.pdfIn PDF document text
    • http://modern-pro.ru/files/file/6413878425.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/h3cvj7in0gb1dlahr4m23sstkq/17825162805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+clean+a+hotel+room+checklistPDF 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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 10664 bytes
SHA-256: e0b718eb88f62a7c016899250d45dfb83567dab7921a69431502413a2e80fdbc