Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c8ef9cc277f219…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 03:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 373f806ac037ea6e4a723667f170a057 SHA-1: 0432abe373f830f159e7f76b3d6dada6bfd79a33 SHA-256: 60c8ef9cc277f219de0888635f1708c63db4e29cd6825018bb385f825b54f3f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=qld+responsible+gambling+resource+manual PDF link annotation
    • http://bagiez.com/userfiles/file/detijuwipetemu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b833552c3---68188968164.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/lowowuduxuwilipera.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afba70a40e5---nobigikuxezezinodelij.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/h129o4l6hi9kf7r9264qir8uef/xujoxevixidifomatavuj.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106080702499505.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/i6fiiogodi4rejlq0vd88dvipj/bodajubafitez.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/2b510af7bbe176d65088c143846e94d6/49491855725.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/691ahi7dpii1q83cqo9lemo2r4/baliwozudatupizosineru.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/357477m261qaiadorv8j1v20jh/zapiguxakawubofiti.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/fofanivobov.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/64851649644.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/41523059280.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210810034937.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/7921903850.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/5361447124.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/198d3d797005c160146cd87a316a00bb/23317172453.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/2449665113.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/kutujisi.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160754fa506d21---sabokanogidelijimijixuse.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/bofakanesokulebuwalaxotix.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b232a7fdf---wabujenurivimubikadifut.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad64b5d94f---5159223093.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_off0000d4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 11060 bytes
SHA-256: ab910dd6d112ea465919dd2f6798f926d9ce0cda13af21a72833d223a027c594
font_02_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 19120 bytes
SHA-256: e11926207ba355582dc0a1ce0fac42d7b0a9c6dff23bf857c1b3784ac3925b77