Malicious PDF — malware analysis report

Static analysis result for SHA-256 60880d4a8ca3e5a8…

MALICIOUS

PDF

77.2 KB Created: 2021-09-02 09:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 03f75a0c4b130afe67ac247f2c89587b SHA-1: efc9efac27f0a4d25022d4d3d83e5304d31ae1e8 SHA-256: 60880d4a8ca3e5a856423a02e01d26738d79c4da0cd1319f8c9a7526fcc14bcd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised or disposable hosting, suggests the document functions as a link farm. This pattern is commonly used to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://jodhpurtravels.com/nbloom/fckuploads/file/66439373136.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9cnhdugo9flnfbcdokgehf8i67/65436916386.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/fefulube.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/fajj56be2kq72a9n12lgdukf5t/fiserajakalebob.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/takinifaturiz.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/30899700213.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e082273341---nimomawilo.pdfIn PDF document text
    • http://domario.ru/userfiles/file/53454078023.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/kejuzufezirapapunus.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/rametifozamusifajifopo.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/23840422368.pdfIn PDF document text
    • http://zahradysnapady.cz/soubory/files/kejebazamipulipexigo.pdfIn PDF document text
    • https://artbynela.com/uploads/file/20975203614.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/cga4scgji5sdomc5g84kfagmhr/gumiwaxipeja.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/wafujupulavibutikazeviz.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/15cdafcaf8f347f840506d14872ec803/63190776313.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5758c1450---53462705252.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-26/20210726112510909685.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/45777217572.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3t5drabpns9vpndpcfmukvmah1/figewuxudotaze.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611f18c025a19---jodomakubodideferepitige.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202108170746024660.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8426c6730d040dd2860f1b176db75357/nedubomegalax.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/be0fa277d923314015cd4383c8881254/wowureruvoxinexatasimiw.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/jenafewuzonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=condemned+in+tagalogPDF 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_off0000c9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B8 10352 bytes
SHA-256: da19815eb857e3288a94df420c4e6f914cfaf4752d19d14fc84641f38f95aff0
font_01_sfnt_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 17604 bytes
SHA-256: 2d888a1175563d4929c27fe2e40847ed801703342298d07cc18429a301a4a019