Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9249ba463d8476…

MALICIOUS

PDF

86.1 KB Created: 2021-08-18 07:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8402af09fd8125d6018aa23174ebb772 SHA-1: 38cc15e0fad6c59560f30a8e794618dff0843a8a SHA-256: ad9249ba463d8476184e8a4fae2bc18885e1e9c18b5eec803a01c7591d656570
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to host malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kis+kisko+pyaar+karu+full+movie+1080p+download PDF link annotation
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/j4g1j3o1m503ikh6ftindral9t/89055665207.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/wiruvokalilenojaka.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/e6q37iio16ddstuudgnbnft586/76545075114.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/151ab9aeac55058c80d67fdde9713af9/tovodotomukana.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712710ad473---mutorize.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/larefevuriniveve.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c12f8d3b795---7222553382.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/ab1ab9aaa1a99fecdf6a4492e9458737/80744706947.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/4456833648.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606da8a5001b8---lubivafutudubebenevu.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bc0919d2277106158c8689a2e74607cb/29217043794.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608beed773147---79223415607.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cf8fec618---69834536896.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9c2d987a0de1c9d68563787258f2403f/24310209946.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/9298a9e16d227fb128b9da340f61a2a0/9474323012.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/28227165205.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1610798ee8dfeb---namamawekoxonoxoxixilaw.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/dijenigizukidivisatu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/omu9p1pmpj5lkk2d4n3r1mpg55/81285311031.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d094a4c2a---javeb.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/kubidofokijadetoje.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b72afb619aa---geruloge.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/lorowokukivitibodizud.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/notixazujalubemoxosu.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/546159baf02845d47282faed3f2582b9/9764575647.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/bigokejitabasit.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
    • https://youtu.be/tDRG4KUz3bM��WatchIn 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_off0000e607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 11392 bytes
SHA-256: 1659870c88eb50812913faedc34033d4e1275afa26490d5ca06ef892976ed467
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 17796 bytes
SHA-256: dd44c2c02aae33fe1d269e79b4e0e29882b0a474644a0523f79294c119bed132
font_02_sfnt_off00012fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1