Malicious PDF — malware analysis report

Static analysis result for SHA-256 100547de6d397f3b…

MALICIOUS

PDF

134.8 KB Created: 2021-09-12 09:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ad3719af99eabe91427ea0ae6d1c777b SHA-1: fb82959acbe55188b9c2917b1a4825b65427de6d SHA-256: 100547de6d397f3b91f9faba4b51d9e61ad80bab4261364424f96d078652d28c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of link farms hosted on disposable or compromised domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of hosting malicious links on potentially untrustworthy infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drafthe.ru/uplcv?utm_term=lumen+fidei+pdf PDF link annotation
    • http://bestbuyfromindia.com/userfiles/file/55967037442.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/pixakojo.pdfIn PDF document text
    • http://01host.ru/userfiles/files/bobixizosowubusasugonib.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/mojuxobebarixigu.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/cb40e844b522c341c81ea03f329751f0/21554188441.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/55162950916.pdfIn PDF document text
    • https://labelmarket.eu/data/file/wajizuj.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/43044652562.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/nejevezilobagowo.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/36895669672.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/59199960106.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/71642027358.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ee61c9d3a63d97d926a9a80aa445d5f7/19644228415.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/59916920665.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/19206807604.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/88356616057.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/fowixalunudut.pdfIn PDF document text
    • http://hainfelderteich.at/wegapafif.pdfIn PDF document text
    • http://tnhmc.com/userfiles/file/65022974422.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/63225711499.pdfIn PDF document text
    • https://koratspring.com/upload/file/likumesizo.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131930ace678---44245556994.pdfIn PDF document text
    • http://gapp.fr/medias/files/rujowidokorejev.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/tuwufuxabitunobesidumibet.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/gewajebufelugak.pdfIn PDF document text
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/lipamipimisolizovez.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_off0001ab20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C337 10020 bytes
SHA-256: 0273c2e230bbee26442b9a62755944e0c5370cb7f8a688a49b8ca9d0411fdd80
font_02_sfnt_off0001d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D950 20780 bytes
SHA-256: 4ec6e23502a81fd588f222aea30e9dc17885ad6b47a4fa3e57b3231fecd20f8a

Open this report in the interactive analyzer, or submit your own file for analysis.