Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb098a4410ca28d2…

MALICIOUS

PDF

66.8 KB Created: 2021-09-12 22:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 952fe1ffe47a813a588b620db4d874db SHA-1: a3c374f39baffabbe2cd969cddeef6be5aa34382 SHA-256: fb098a4410ca28d255eebe2b6abb19fcc64cf7c3303fc61c9291222dde203bc3
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

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://bhsbeacon.com/FCKeditor/file/35267713109.pdf In PDF document text
    • http://murielbellhomes.com/userfiles/files/23029814283.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/gukepuvusefatomepo.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e28631d2fc---73848030964.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/razoxafidadiberaxigosu.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/vilirala.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/vukiduvikitikop.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/zuloxoxikerefasozoxuno.pdfIn PDF document text
    • https://people11people.gr/uploads/File/sijorojopud.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/69736888900.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/29766366081.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f06a027eb68a2bdaaa90649026f420ea/84307115604.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/13756290374.pdfIn PDF document text
    • http://airsoft1.ro/files/file/52883263032.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/jafafefivolugutejuposov.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b87c9329a---zodexewifowifamezovokapi.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/kewogovixojuzu.pdfIn PDF document text
    • http://willbramephotography.com/zubavudunipo.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/xoralogarejoxitojas.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/nenikosarovo.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/a41c3f7836f6335ccd7d1a73a00b878a/lusirufop.pdfIn PDF document text
    • https://dalba.net/other_files/File/tivukixipujujanobateso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=surface+area+of+shapes+worksheetPDF 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_off0000d4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CF 17920 bytes
SHA-256: cc8a39e87ef71e8ca0ad39c15dec8c4cac418ec9af0e331886bad75e8557ad20

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