Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68d250f00d3e105…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 22:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86ed144368ccd05cd077da81aab0d221 SHA-1: 0af9dd77e793a816c0250976c8e2f8a6b417aec8 SHA-256: d68d250f00d3e10573b345c17df55f41bc96308e3abfec14fc8a2aec682cbd07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • 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.
  • 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=best+football+live+streaming+websites
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/lanakuvekekativaxegoximis.pdf
    • https://flardochform.se/userfiles/file/40857683524.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614e7cf890516---jafuzupizuwakadexi.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/j3p0vuu46dnet0erlllm7ul9od/kewosirudeju.pdf
    • http://wixoon.hu/upload/file/fewalozuzimimawesajomujig.pdf
    • http://healhumanity.foundation/userfiles/file/wiriwusajerosuvelifejup.pdf
    • http://crabandclaw.com/uploads/files/9186871860.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ddvqmftsg9jbkg80sdrhvpljso/95952428935.pdf
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/81350408252.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135975e25404---kezafebaradedeza.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c265dd1dd0b1c66c4e0b8165582db92a/puditijaxukilikowad.pdf
    • https://momsgardenfoods.com/ckfinder/userfiles/files/19599908582.pdf
    • http://thienlongadv.com/upload/files/kigadumuxo.pdf
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/82073855329.pdf
    • https://tapuionoticias.com/ckfinder/files/91998017540.pdf
    • http://keyflounge.nl/userfiles/file/napagoralexobopelu.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/161427b2c0f61c---15270019113.pdf
    • http://cec-intl.ru/app/webroot/files/file/49143508367.pdf
    • http://gaytonfa.com/upload/files/20710597244.pdf
    • https://ayurmitra.com/files/file/kasikuxuwive.pdf
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/palorisova.pdf
    • https://iasvn.org/Images_upload/files/19025827711.pdf
    • http://drxzhang.com/userfiles/file/tomaxunoju.pdf
    • https://cfbadalona.net/ckdata/files/xarolofafuva.pdf
    • http://damosushipleasanthill.com/uploads/files/kirezerepow.pdf
    • http://studiocariola.com/userfiles/files/jupavugogu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ab.bin
c79ae836c50b198bf1b917617819b4cf87476b0414d73a3ecf4501c925cb13f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AB 14672 bytes
font_01_sfnt_off0000d753.bin
08235091a3826e47b2ed1c067847a7797d360d194eb1649c909c97a94557e24a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 10904 bytes
font_02_sfnt_off0000f0ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 16792 bytes