Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50adb26fc5301d4…

MALICIOUS

PDF

95.8 KB Created: 2021-08-26 02:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 56257bba9a5cad8ff9995fc204b18258 SHA-1: 935775077d88a871231ea694b09e68507a6438ea SHA-256: c50adb26fc5301d4a54ba112810648ed4ffab62be4d813c8e07a94350ef8d547
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=hypertrophy+for+abs PDF link annotation
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/b559ec47185867614906e4685b260f5e/sogikinijejubu.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8aa767730---jamikogifekipikataji.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/gitozogasim.pdfIn PDF document text
    • http://amdind.com/userfiles/file/rigumatapivide.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bff58d22c---vukivuju.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/79340123045.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c55932a7717---16098706757.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/rirakigad.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/45463808128.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55241162650.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e801a1528---weketeb.pdfIn PDF document text
    • http://quaint-house.com/15861531296.pdfIn PDF document text
    • http://come2menorca.com/images/file/xagaxaragekuri.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16078b978454b9---vexazaberogatalelatapo.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/cof8fcnb7uqbnk67h6v30hj0r4/88808040285.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/kefadizaj.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/woposuxurolowafimi.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5bf017b8053d613005df58b897909a52/likevokavasor.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/fivezozawozosulawes.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079950e481ca---43945133118.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/71714974757.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/74835838a5a7eb5672779ebe217ce689/rined.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/84333871606.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/lomujuxiwenuliv.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/94094667161.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3e81b250e5545e75d45b64babc732e9a/98855290162.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_off000116d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D3 16512 bytes
SHA-256: 9e019e88d1fb705e16157da3205694cbcc85461f52efbb605612e03369d03502
font_01_sfnt_off00014192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A9 10460 bytes
SHA-256: 7855f30f695742f69840fab4b0f7b3984d78fc60ba804fab9ca71efa63537b0c