Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca00700f18ec19b…

MALICIOUS

PDF

99.9 KB Created: 2021-08-10 21:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 67e8feb58cbec6e749dbb26c06e57867 SHA-1: a266a2cb33e44487007b612f222d012e9aaecfb4 SHA-256: 7ca00700f18ec19ba1224bf25435c403c7705a8572ad60fafb51b28e729b4c00
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting an attempt to obscure the ultimate destination. The embedded JavaScript stream, while not fully analyzed due to obfuscation, likely contributes to the malicious functionality by facilitating redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://pixomot.ru/uplcv?utm_term=what+does+brand+awareness+mean PDF link annotation
    • http://hourinkan.net/js/upload/files/51751694549.pdfIn PDF document text
    • http://susanirvine.com/clients/82887/File/rinapodujudopenonipapifa.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/lirolilupivunutimulej.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/jopotagerenusid.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/vifipoxemevorit.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/bojonefopuzoxupukidemura.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091beb22ca8b---94934276619.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8674a757880aca3b719cbdec310156da/viwus.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/69841033216.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f6f99591f2f600cdcb7a6a34c8da6dd4/1152118697.pdfIn PDF document text
    • https://kham.vn/userfiles/file/lasilopupofulosuvinupozeb.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/8e3d49271ae195c8eee74e401fdb8c14/pojewupiga.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ok1645fkt3hdav5gpjnt4df9q0/77327882868.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/49722046160.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16094597641736---xowifedafowasiwojitu.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d038fefd---vigibunuxoxuvu.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868821e97bf---bukojaxikokel.pdfIn PDF document text
    • http://ezibra.pl/upload//file/demapupiporesomifeduv.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7163d08fee---54546741691.pdfIn PDF document text
    • https://marosme.ro/hirek/file/72277932867.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/1b7e92984cd79caebc48096e70a6a14a/73050546572.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/fdb6e322532e94ad197f398aa1134085/66890025094.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/92983319210.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6ef8865057ba2eb06ab5e321ec06337c/susiredewinokonegadopib.pdfIn PDF document text
    • https://asi-filter.pl/files/file/vanasebexedipidatonimadap.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/157896591260e532e4d6d98.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_off000120a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A6 17656 bytes
SHA-256: 3bbc43800d9cda50296d3625e5ada19fad06fd185c716d1d707a75d1de617f86
font_01_sfnt_off00014f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F34 10592 bytes
SHA-256: 3eda0b9a628c43f590b6875d5d775cd8fbe3e3363c3d9de51146dd4504f380d4
font_02_sfnt_off00016742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16742 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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