Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5791bd5366348e…

MALICIOUS

PDF

84.5 KB Created: 2021-06-15 19:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46e44b4bb57f7a5d43c710cbeb424ac0 SHA-1: 13c03a9aafa855764098e094f97a8c932e8aa75d SHA-256: 6f5791bd5366348e0cadfc881c160a5e7994ae19b3ca87725569592d7476c5d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5325

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://medvor.ru/uplcv?utm_term=virtual+app+for+pubg+hack PDF link annotation
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2469d5be3c3a062796670bba3b018eb4/lakuxafisugebu.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823cfa083ad---6704736324.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa8018bffa---53990219439.pdfIn PDF document text
    • https://synersys.fr/contenu/file/50135570489.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cb6225bb7---41862274631.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ba96b27e6a57797bc092a76549594460/47000479587.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606efd8d67eda---kevemepotipuvigafalali.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/22865496985.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/20a1ca1596dfba3d37545a28a4ccad4d/81884874164.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/2detmrvdhcu460ul5ioe8ltbpc/xiwipasu.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/nedimosixix.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/vazusegukenupi.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081d440c9b20---21911531217.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081337338ea4---vemedi.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/54891243406.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f13047ad19---27298968506.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 5268 bytes
SHA-256: 8ab33b2e7481521f22c41e00256ab5b038043858d959a7f6e717fbfc8f86a64c
font_01_sfnt_off00011a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 10824 bytes
SHA-256: d9358b6bc0cca8fe9ef0262a7007e4a3065821c5ee185064b84e6d90bbf34928
font_02_sfnt_off00013f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2A 5796 bytes
SHA-256: ae8ca6a9cdc4ec0eab0ee821a8fee0debcedf2c47d08bf1613160a247bcee466

Open this report in the interactive analyzer, or submit your own file for analysis.