Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba1c05e883eb7ef…

MALICIOUS

PDF

157.2 KB Created: 2021-07-01 22:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62bd6aed3e11f1c6482c64e79ac2cc8c SHA-1: e37f73eea1072596831081e976a8365602fdc6bf SHA-256: eba1c05e883eb7ef772aac3034b413e231d02564d1988a2168f652a9c4481d79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

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://wastran.ru/uplcv?utm_term=chance+the+rapper
    • https://bczenekar.hu/files/file/potovawatumititinow.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608596c0d35f4---nozetulufebadunexata.pdf
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/20881733934.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0554946d7---dalenixub.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50499d96fe---kalonemitot.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/55081ed7d43edafb432d0ca596ec8ee2/44576276442.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e9882598---26446453643.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/42fca348h7ng7i01jjvqphf6q4/91616350250.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210701233214199.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/b9d172a8717fcd2df2a247e6e01af0c9/52019158876.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0avct119t3d7afbclu0jt9eqj6/darufozizerenefiwezi.pdf
    • https://bbpartner.cz/userfiles/file/tagamosurijotodam.pdf
    • http://katyababash.com/images/uploads/file/mewevakijirurosaxa.pdf
    • http://aliglobshop.com/userfiles/file/xigibesotexovedewizujo.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ac961128dd56f9824b2eb5e1a6ef42a5/14568423404.pdf
    • https://nadinerogger.ch/userfiles/files/noxemujaruj.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/vglpo49i86f3isi99dsf7s9dd3/57455517637.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/69659aeff50cc9eaa5dd41ff8088c343/mukabigafotolofativavilem.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf30e82cb5---zisopalomafemeg.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/fbc749785ce75ea40f3be6317369c528/12653453299.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160838ec8bea0a---2036794783.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/6495b0cb0e4a5a846b63694795d54254/68986662226.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/23303804c4d9a74626d98b4d65a239e4/lexerepixevenufa.pdf
    • http://accessprecision.com/userfiles/file/294848049.pdf
    • https://egokituz.eus/files/galeria/files/lodijiwoxebuzukidipidu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010271.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 16792 bytes
font_01_sfnt_off00011a88.bin
c1406a35bc448eaf3cae018a0b00de9c3865a3c3a55b0778cd534ebcb0ce7994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 10076 bytes
font_02_sfnt_off000130e4.bin
1369edfc7972ddd86a0cca66c33be07e4fc157f43048c66b179da0641aa54729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130E4 104208 bytes
font_03_sfnt_off0002365d.bin
9c9ccd4a96fd4808f2b540048d3f070856db0fa5b634a356ec5009b13b4f7031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2365D 17576 bytes

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