Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb82171b5d566348…

MALICIOUS

PDF

84.8 KB Created: 2021-07-01 17:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: da831648e1aaad91d948c4d6440d8196 SHA-1: 58f775f7fbcea9d7f0366d77811d7af610a09f6f SHA-256: eb82171b5d566348cd97c2af2c1cacab829266f198a38865afa7621a828149e3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, many hosted on compromised WordPress installations. The primary URL identified is https://irlanc.ru/uplcv, which likely serves as a lure for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=luke+and+laura+unrevised+message+board PDF link annotation
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8b4c69ef9---35871779104.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160811b43cfca2---wopurunu.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/14e1e401e832952bea35ae24c1830f64/guxirek.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089289e20695---teweketizizawopisipa.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/zatiruzarawu.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/vupav.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c5e28a11b---92370720969.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d3abc5392577e1825a1766221533c94f/xaduguputezupujelifa.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/jivulerimabiruv.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/vopoluxexojakoxekuxelox.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/peferezoxixow.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/64957192277.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832e6b4067e---delamo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/54010270619.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/f72c41119a5f81fff44c4f330f84dbd0/29783368726.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a44e71738d1316fde6296f4415a3f341/kevar.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/xobawutujapekinolakixodaz.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6859417f2---nafibasitarid.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/lm0b29vl2s1g8gjhqb9s9ptme3/89167394881.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/43922036162.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc044a6cc2---nojigi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ef9b3c7df---27754396798.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/juvanufamitaz.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/07eba5963a34767cbc9ac8b8b32a3834/zivit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 16484 bytes
SHA-256: 907bba8f38bcc7cd06da2ffe85e7c78097a4772ef7430ff0153373522c7eca6d
font_01_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D27 10848 bytes
SHA-256: 50d3825a521386c698ada5c4f3014a71d5a78e73435b020dc4f5329b1c4fe5d3

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