Malicious PDF — malware analysis report

Static analysis result for SHA-256 e409ae05b83f758e…

MALICIOUS

PDF

97.0 KB Created: 2021-08-13 10:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 765e732773b99d8eb16016c42c1c6016 SHA-1: 0597a6ca63b0a85e84fc23ddd68bfcb92653c57c SHA-256: e409ae05b83f758e2a7af7ac5803b51e5fb5db2413d8fd91db027850f14430d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the PDF is part of a link farm hosted on compromised or disposable domains, suggesting an attempt to distribute malware or phishing content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f9482d272---20048821511.pdf In PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/dc118ce766c5d846286e6e097a95b819/92399026396.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/wixodamutawekizutuxiwoli.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/waxizewinapovafotev.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073165965809---98125814863.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021062963112_300044643.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/telanevomaju.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d3f687e7f---24001261262.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/73711074904.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acff44cc72a---36884205576.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/55340378013.pdfIn PDF document text
    • http://centronegozi.com/public/gezawatubimudexuxulul.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9e5dd6c56---nafimokokefazoxixirolexe.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/ruwonagofekovorabetono.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/99373672266.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/xepiwasejutajekutekumivo.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609b97e0ab061---pasobam.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/fugotazajegexixawi.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/4604200319.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8955258f347cb4a632220dca86f92ec4/36418610019.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93de0f421---lebasobibaviwo.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607458f480759---85090653574.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/28d9550662b562cff78b667effcc76ae/bifepivobinotupabakoji.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3220782b62---37006574293.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/19672621527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=corel+draw+x8+tutorials+pdf+in+hindiPDF 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_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 19184 bytes
SHA-256: f19a1ab8f9cff2cd303f8553fb396b124a57170edcc418d109abe9b35308cbb5
font_01_sfnt_off000143cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE4 11124 bytes
SHA-256: 9010af2c72d0742c5a0cd554c3dd7e1af217a81419394147c6059b2fc37b0393