Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb7030cd0c996e3…

MALICIOUS

PDF

98.3 KB Created: 2021-07-05 09:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 558a7b052995bbcb6d1f8965cc3ae536 SHA-1: 1d82d4b2b615f10e8bc9da5b99e19ded89ea4bdd SHA-256: beb7030cd0c996e3d05ff163070cff1d4745f11f54cdb56f6518a9b10a5ed6bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as containing a link farm hosted on compromised WordPress sites, with numerous distinct hosts identified. The ML classifier and ClamAV also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of these compromised links suggests an attempt to lure users to malicious destinations, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc73bcfd1---nudoge.pdf In PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160736f7a4e3e7---morimurowep.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/f144d9a87ecedfbf32315fbb3be922e9/90861059465.pdfIn PDF document text
    • http://arslanemlak.com/E/file/32960008996.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/febosizukugazikafeko.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/rarawakugisu.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d77d389ff18---46220947332.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ctl7flc4qnkgllscs6f1fqb6a4/tapujuzaji.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/dc602df389826439db2945e543ad7669/jisixobisewali.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/pbi19lb1iu8iu154fu5qg6rbkb/turamiguj.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/81094083961.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1c9d79d4---bovozibu.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/pubekuvubomogowawifesit.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/17mttfu6t1p36s315cphpc16e6/wafawejewabusedagixo.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/wutusadabavogomote.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a90ed31df1---muwobiwapegajupugovoja.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/54afde87efbb9497cfc311fc63b35561/raxijefow.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/7944230266.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/zemulupiserozovajof.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160910fb2c920b---49692628929.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/59f2563d6edfc620c9af764500037a53/xeruvorikadetaveno.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/96768293887.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075dcaac20bf---82241331894.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/vpgbddsv4q90q0qifailh9badd/dodolerobopore.pdfIn PDF document text
    • http://jejuecotech.com/ckupload/files/sagalewovej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+put+to+pdfs+togetherPDF 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_off00011e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 18284 bytes
SHA-256: 150b3b5fa5852fca2a4095d15affcdde7d661e9460223d4146f4ad8872ab4f55
font_01_sfnt_off00014bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000163d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D2 10548 bytes
SHA-256: 6e8b570a2285c12538cdd802f378a82e0d9d24e1c417af0462db4c39e352ec1f