Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebf18f9d6ff8146…

MALICIOUS

PDF

83.6 KB Created: 2021-07-19 14:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c959e36c71736eff1fba905955a9a775 SHA-1: bb4640d29567305e4cf547c427ad23ecdb07f277 SHA-256: 2ebf18f9d6ff8146215c36b6973600be4b825df849fdae248394405a5eb96677
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve to redirect users to malicious content or exploit kits, a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/s58juqqsiq54oohvqlqcs961ls/17091272626.pdf In PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/58d0407b313b698910619e1db243c186/kosukoxaxagup.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084249700ddb---97789461040.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/wusiwokugivuzapulup.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/56024829172.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/c5dfffb75bedf63e85b3ccc97f24a6ae/lenaxunetijotes.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/virefilasarikibuzefejev.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/janerodasofofi.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/saxikabolodumidudep.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/aq1t7oho40qdqtc788qs6dcp81/jawalil.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6823989508---86192735966.pdfIn PDF document text
    • http://xn--b3ct0dc9bc4a4g.com/userfiles/files/sabuposinefapatiselokof.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/tk0ic7sbgtaqdclnoh74l01rf2/nejonopozanivuvikibuw.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607afcd7b2d1c---89940554525.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607376c51c858---94404216788.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/4254c512278d7ca079854e58fcb9d455/kikuwipujomakevanif.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/8a7100208314a7e4501fc0bdd87776f7/42109355613.pdfIn PDF document text
    • https://designclarf.it/file/vofixet.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a548bb02399fb27614b0d2fcfd84fcd4/40697187390.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/texixokikozugabixigaju.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/94650193948.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mibexadevikamuvizasazuz.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/af1b04e6f3905269279352c50840a197/83570932902.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ffb4e243e---wawubibiwawewiw.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/zuxilolozu.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/dujotubaga.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/xovekadavojile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+pavilion+at+carriage+farmPDF 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_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 17000 bytes
SHA-256: 3c126e21429b4441023f614b45c6fc94508fd6f1b06cbe71d80198f7d8567f99
font_01_sfnt_off00011052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11052 10788 bytes
SHA-256: 363b1722a427854b228ffa956670e9169f923ae498a427d87722f3926189d8de
font_02_sfnt_off00012906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12906 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1