Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de004f34e163ea2…

MALICIOUS

PDF

88.4 KB Created: 2021-08-02 07:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0c34b0e2ef976ea1ad11e6b0e5fd8830 SHA-1: fe39a95f05e2ba38d791603f9b6914eb58cbe850 SHA-256: 8de004f34e163ea269a5214640a2aa8b6a62ea6903cb3ed378ab1f1b11bbf7e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the detection name indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd72241e8e---vixebovujewa.pdf In PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fc449d175---75652700786.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210801175028.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf8cd468cb---vanuzavereg.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/sazulaxobogid.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/a3661d0d663d3b988ddff4d21d50e9b8/9895755846.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc218d45472---49003996896.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/13036108912.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/febasimopazebofubibaxipeg.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/13940316747.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079914a6b065---72372059966.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/18415401470.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/moxejegisuxosefekoxigod.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b37055ebd---rafowujukuzonukupidi.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/fdfa9eb1a78cba3cfc70eebb019bf353/94044172829.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/86osje0k19hkutttqf53hjo2kh/mijavabolijufunujezexejon.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a622043baa9---woxukusab.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c46594b29a---nosutudafotizafub.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/51287070648.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/pibepopibonisuzezugoxo.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/44259015036.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/kexesamapixagimazuxe.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/2837738984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+rotate+a+figure+90+degrees+clockwise+about+a+pointPDF 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_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001068a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 11492 bytes
SHA-256: 151696bf36aa22f1ede896af29416786fc86ddd96c00ae74a261dc5348e66369
font_02_sfnt_off00012176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12176 18192 bytes
SHA-256: cd41e1903f8173901d64c942b0663aba93be418c9b6706ca7ee9c29a96f62b6e

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