Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0dd2e1ea49cbbf…

MALICIOUS

PDF

76.9 KB Created: 2021-07-25 05:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 983162b96e54c072adffbfc436d54c2a SHA-1: b86c4a3bb873a19c6e453aa9df7d3902abdc604d SHA-256: 8f0dd2e1ea49cbbfa8b17b803a2e7c3bc48aebc6b9a1ce38b5261bea3f6b9e3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm hosted on compromised WordPress sites, directing users to download PDF files. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading further malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607be96f445f0---76284072022.pdf In PDF document text
    • https://cgeminfos.ma/upload/file/88924577735.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/toxewamofo.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa5cb651e---4337564656.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b491fe859ea---80871635266.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/nupumelo.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084df1ad06ef---73161478976.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/kejobubulubadeneked.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d9942926b---kutatirapoteri.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9bbd0c3fd---kazovolujiwow.pdfIn PDF document text
    • http://balone.net/_upload/file///wokukipanel.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021613811548775.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5bd24f342beda685ad75bd71cdddc4b5/67353293403.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/74652784161.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/nofilorufikitulofoseba.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7393e723f0a8f6780bd097591dcb0521/benikep.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/xoropij.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a27fe8ea5f6---vozedabivitede.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/74184673935.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bi0l55u1rgeijmoqsbuno5rpm/94369590643.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5e87e814f---gisenepolubinurabe.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e8dc030fdf80045a4c073f979d7686ce/gusevalevijawapuberepis.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/18858970181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=agama+car+launcher+pro+apk+2.3.4+downloadPDF 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_off0000c96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96A 16056 bytes
SHA-256: b59895ff1854800636f940ad95551eaf8bf708625f0685a22f16e046cfbad68d
font_01_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 11300 bytes
SHA-256: 2c2ac3762d9be8bfc546e307eb1f2bbb69ef1b54c1e3a758927bc8dc6c32dec3
font_02_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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