Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dfea930031ae6e…

MALICIOUS

PDF

95.0 KB Created: 2021-07-13 23:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d6a09ae995a708b390adbf73fb5e84b4 SHA-1: 7ed1b6e34bba59692fb9acb1a856f2b10a30f451 SHA-256: 65dfea930031ae6e2061102fc8f85edd9e8340edb565303cc3a7a5f048c622f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links are the primary indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://medvor.ru/uplcv?utm_term=hate+cannot+drive+out+hate+only+love PDF link annotation
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160981f36108d4---sokoj.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/jovesafikopawatunu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608966cc136fd---94234640075.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fekesugizi.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/fuj2aki3ajpuifvevu3l7dtj6i/27093216443.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://mondoacquapiscine.com/userfiles/files/84046473878.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e1dcea0b---4928019500.pdfIn PDF document text
    • http://chongros.com/userData/board/file/luwufejiludokokibe.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/fixetumisisokumego.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/pokanod.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9596d22f3e---wunufenija.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc4d5b41b1---vigefigomebetupebasexorem.pdfIn PDF document text
    • https://vestol.bg/files/file/17084152182.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb642c4259---sasafexirobokababov.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/vilejejitokawapumuwafop.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/biwajupujekis.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/pavikepiz.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aacd9e82aa---keliduledafoxugazemojot.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/fejejogiji.pdfIn PDF document text
    • http://lovellreunion.com/clients/4/42/420738e4954c29d3cfd02fdb1bc9139f/File/2723106563.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/30406138424.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae10fadd2ed---sunipowabube.pdfIn PDF document text
    • http://kalikraft.com/images/file/65586402622.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/94091929585.pdfIn PDF document text
    • 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_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 10568 bytes
SHA-256: eb847f688a68f35fc84f9c0e1353f1068558a5fe463d9442e37b3ea402ce9adb
font_01_sfnt_off00012823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12823 17592 bytes
SHA-256: f4c39fde593c2b9c0a4a984cd8a1504ed498639c81ef20c6551895dd81d61983
font_02_sfnt_off00015686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15686 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1