Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebe602503c4aeaa…

MALICIOUS

PDF

83.3 KB Created: 2021-09-23 01:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3efd81a2f9e633945968fb05db06c7a4 SHA-1: 0c6e89b30752ee16b3db53c5db2667aae4f3731b SHA-256: 0ebe602503c4aeaa5ce8bee5810359c55c6e7c4e3b1997fa45c04accedcb7903
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous links pointing to potentially compromised WordPress sites, suggesting an attempt to host and distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16143338338da2---gezuradidigoju.pdf In PDF document text
    • http://ty-universe.com/image/files/20210908_231147.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/50498814738.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/xotepirisi.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zixixuf.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/43417804059.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/76000153302.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/923a0eb7a0e2ed242168657ef90f3ea1/60020546989.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/nawezumi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a2b9385e0---rasode.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/jifirimarikixikunegiz.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/68168382157.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141f1e28ac32---32156215783.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/wepetum.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/89737207309.pdfIn PDF document text
    • https://serka.com/serka/upload/files/fifepizeve.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/fazopolibezezokigoxeb.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/xaxusulomalo.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/bikodepavon.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/ruwavop.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/dusibebediruriramote.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/xiluza.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/96980330087.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/disununafaj.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/30916077024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=android+voicemail+set+upPDF 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_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 10824 bytes
SHA-256: d70227a3ee9db68c7bca337cea11d14703dc3a63aedb640d5f1650bb9c17845e
font_01_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAC 18920 bytes
SHA-256: f61a9e7691efa7fa50be3be7149b43dc49c748330d56fdc227527bd9519a9f1c

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