Malicious PDF — malware analysis report

Static analysis result for SHA-256 684c9de4e7e4e46d…

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 01:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4d6cd71e5898b406216d94a0c0b17507 SHA-1: 6d0648594a6593d74e761420c3a3b65932b9db02 SHA-256: 684c9de4e7e4e46d296a310712ac7652917269980e6d02be1da845e8d1796646
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of external URIs and a link farm heuristic points towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ebd10d07e4---rupisiluwidubadiweroke.pdf In PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/50856452439.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/dujaguzidegosafinepis.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/7714017942.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puperimerobiwe.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/32902567052.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161408e755f9f9---zibopobiwemumo.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/zuvamevotigoxopagug.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/33908146056.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/99335448555.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/xewemewevasewawedogaxegi.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/kudedoxafapopevub.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/6e5e3620770a353696c01b1e35011990/38932995164.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1631020147.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210916195040.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae0d129e41---konetapabufa.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/jimoguximamo.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/22a2e887950bcf47f8fc1fcf889bcded/nenesuvurixotusipejitom.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161415ae7025f5---vaneregukuxiped.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/muvomefavesijim.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/wukerudux.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/616920a5b325d9b320022d572cf37000/35452700668.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/besudedebajuzixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+transfer+from+iphone+to+android+using+xenderPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB070 15592 bytes
SHA-256: fb68e9088f19d2e3a8a7d2275bf0610c06d3122ccdf6da758505400bb1698629
font_01_sfnt_off0000d808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD808 11180 bytes
SHA-256: ce207ff5b8b66bc653fbd065aeffde8a817ccd926107a3c95f316be55e79f580
font_02_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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