Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8a80950db2fe1d…

MALICIOUS

PDF

79.7 KB Created: 2021-07-13 09:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5409705546718a58ba7786c385aa099b SHA-1: a94b8c9925c39fddb78822092bccf95adad9faf8 SHA-256: 2b8a80950db2fe1da01cb5bcce910ef3c0e1d1d0a41f30818a86134e2cb5a185
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection indicates this file is recognized as a phishing trojan. The primary function appears to be redirecting users to malicious or compromised external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbc8b08095---704160533.pdf In PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/sebasikodabasufos.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094345ad7863---95533126767.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/c56e191698b163b4b4762f2fc691dd26/96243621612.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5d2da3bc3---niwomolifojujapezu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0d29cb34c---kukexavobagumezovof.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1169035c12---rituwozurizijaverebiz.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/87286881561.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/16077766902.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/9vsl6s85fu7acp576fvgvb97l5/rapinogazelebekawe.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/84446117485.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8f67af8c1---dumov.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/silotugeteresutidipi.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608761a65e50c---nagelifu.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/hbt8m16fe9shnsih8pp8mn0uhi/wevojigulovisevudas.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092d6849dbf7---zolinupudunusugos.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/dozukikuxove.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/nqjp3th4l2db4tu7efqlqr0kp0/13649990687.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/13170921656.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/kobapip.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/wabidew.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078fe9bc57dc---13305193379.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/6htpcg01jqe6jc0qhag6rdeug2/fasotuwekozaxawiwiti.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/98106963185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=baked+asparagus+and+mushroomsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55E 10848 bytes
SHA-256: 4fd29d43e9d09802a19a29e5bf0700a93e551ea8f531c917e2a7579733744b38
font_01_sfnt_off00010e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 17628 bytes
SHA-256: 42eb3fd0f39fd58cc3ef31b45625f0e850cba2ba929245a8585052a5a7d5e29c