Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e68e32d463f117b…

MALICIOUS

PDF

75.6 KB Created: 2021-09-10 09:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c2d91acd85bd55e26d1c026127b3ac02 SHA-1: 885d0c510b46aa12da5576bf08aa2bb8207bc740 SHA-256: 6e68e32d463f117b91ca952237ad43dac4fdb93f4c3aab57c3c244a8fdeebb03
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised WordPress upload storage and other disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links for SEO manipulation or to host malicious content. The embedded JavaScript likely serves to further obfuscate the malicious intent or to directly redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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://organicearthfiji.com/documents/file/fazunorozufomufajigoja.pdf In PDF document text
    • https://fasaac.org/temp/files/7167650907.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/norapapuluvofisilutode.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/magukezewagukaxup.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/1421089970.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/sarulokovuberejabozaj.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/32649145637.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/89419793277.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161399b672f8a0---ragigezol.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630805191.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/pukurobakilos.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/xekagorowixoso.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/58681493253.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/11126491842.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/toximo.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/tagabopetugoluwe.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/vibezosebamunemerutewus.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/0c9knjrg8ej44vb23t2k8pbn51/34124686521.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/90631315391.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/79187970366.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/e6c4104331e24628f1d6079c7078c309/75308629148.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/74153942735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=batman+arkham+knight+androidPDF link annotation
    • 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_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 10496 bytes
SHA-256: 3edc254b71e60bf9be73c22e1629016da58974f2f54a7b8d5ceb2bd42bd80478
font_02_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 17304 bytes
SHA-256: 624be0bdc08e5b5296ef14d91e3d03f34b8b5a32299ec633c9daab562209ef44