Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9b6d1d43f0a7ad…

MALICIOUS

PDF

65.2 KB Created: 2021-06-24 10:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 993934b5f90558372b67b9e5b1d58db6 SHA-1: 334ce7d3c8586a1ad38cb7c56e677e8850c75f8d SHA-256: 3b9b6d1d43f0a7ad21362a6e39775b99253725d40514d1df0afa410c1f4338d3
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 0.9059

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://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/6f374cac73a3c62aee6e8476bce70078/gabexabijuzinekukogawul.pdf In PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/0kgm5k3m08p2eljo76n19dkcgq/28854108301.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33347242aa---61870526262.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607df5223641b---pegemetevokul.pdfIn PDF document text
    • https://aedwea.com/upload/foto/rexenibivawonabutotazod.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/95f9ca51d05d0233877053d0ac609639/55880243806.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d498021e8---41782434099.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/xafovizolake.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098484ca41af---50073013082.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/gikuvonidetigabowa.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/95917599631.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/86923475952.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ad14105852a---fipepumikozujutidulu.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/kewobodewovolukalef.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/713dd3ee31dc1f3f5f6d4da3c08edf57/90286591581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=maths+std+10+solutionsPDF link annotation
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 5016 bytes
SHA-256: d001f39b7501ed1d4b12852a4f8bd2719df9abd47eab02ff8e5ac7f2f87f99b6
font_01_sfnt_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 10276 bytes
SHA-256: 8250709ab1230aadbf6713d38aa73c3ae0fe70eb809339863b9d80fbf293e404

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