Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ceae8206b8af1ae…

MALICIOUS

PDF

117.4 KB Created: 2021-08-08 06:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4e592607f30efd8a9c580ed87d37631d SHA-1: 390f3088e01b9c88e22d843c39932398e7054a5a SHA-256: 7ceae8206b8af1ae92f0ffb939a7d2f9e978c3a021c61f802fd5499b9177a327
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites, often associated with phishing or SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/92725b5816b75582dc5a17b068b80f21/denanamadalisatoxolapak.pdf In PDF document text
    • http://f-okinawa.com/img/tmp/files/16357872436.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160744af041b86---94468884889.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1ammrkavo86g702po5nekm9mn1/47045681613.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/mivekajafireludeneni.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/jemona.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827107d5839---92139019773.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/wibedutegonoronir.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccb0eea76b---12553891147.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/fodak.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/q1sejm9217tjalmiie75b5ur80/saboma.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6b230a567aecc498f2987f6fec4153b0/20748474350.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/zekironogexekexawodalojat.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/17717918584.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/8c6456fa11946c0fbf82c088d6693241/88488552680.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5affb7427---23298382756.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/45461785462.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16070b5fae1a7a---laronufegopanudujuji.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/38127986682.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/88113994485.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/506e98bbeffaebbec169a7cc50ca1439/boroginowuvom.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608033bd05728---17790387383.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/6878254184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ethiopia+history+in+amharic+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEE 10804 bytes
SHA-256: 7a68bce9bc4ac1ee830c34ffe2a05940a4e309be8e772d0d920d5e6a782b162b
font_02_sfnt_off000177aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177AA 16244 bytes
SHA-256: b1ef7b52ed35dfd01120c19ee4193d967dc828f2fc549fe1a2d8c3c5029b4647
font_03_sfnt_off00018d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D92 23068 bytes
SHA-256: d2e3e1b65444dd32012ea498782b87777845b5a89ff50b50a9401574bbccf232

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