Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ee03f0103519b3…

MALICIOUS

PDF

118.3 KB Created: 2021-08-16 10:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e1b42d8fa6701f845c80f4da85d3e91 SHA-1: c2a95c660c49585bdbda87167ed41a8b43903fa3 SHA-256: 20ee03f0103519b3eb6ee6291387a006f64c0dd70a07288d7b0e5726af76c415
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3211027eb---nibovatojuxaxumajadin.pdf
    • http://maturitni-ples.eu/UserFiles/File/5885706917.pdf
    • http://marinapogon.pl/upload/file/pariwitarimimoxozobutad.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tqfk6ek611mfvd19356aqg9633/lelirumexunapezenaxet.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160838900cc286---34030528407.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a97bbca1e15---ditiguzukob.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4ahbfvhpo0o30rdqu1tomvl744/pizowanixawivelap.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff41da588d---19903875653.pdf
    • https://bostoncake888.com/UserFiles/files/36162150910.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecbc0e9566---nokadopejapiwaporugefeme.pdf
    • https://abe-rdc.com/userfiles/file/42249986287.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/m216gvtp74ka3m77ebkui7keam/96296047478.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0569d3a32f---43756353363.pdf
    • http://hebammenglueck.de/ckfinder/userfiles/files/23375367752.pdf
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/83881411864.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161059ae8c856a---marupanopojetuzika.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da027172047---salipujitaradovujive.pdf
    • https://digireg.it/upload/gijevigal.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f7d5930775d408c2a5c3e5fcb4f3f803/67660006351.pdf
    • http://bawaconstructions.com/editorData/file/ratafoxalemubi.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100d9dbd0b7b---nizajokato.pdf
    • https://rajatotogroup1.com/contents//files/tetub.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cde7c6e96---lepan.pdf
    • http://alompar.hu/uploads/content_files/files/rozosesagibamuxokug.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b88bbf75190---fupetivitifipuvojo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=bater%C3%ADa+de+riesgo+psicosocial+universidad+javeriana+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016780.bin
4001bc413610471cf9a4140226ebb6391bdcb444069397626bcd52c43bb39aa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16780 11204 bytes
font_01_sfnt_off000181a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x181A2 16792 bytes
font_02_sfnt_off000199b4.bin
fce88d3e5d0af7b8fc102486af96d7426b909eaddb81ccd98026bbc2064fad2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199B4 18340 bytes

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