Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2c39763854cccb…

MALICIOUS

PDF

71.6 KB Created: 2021-09-05 16:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9cccda216c7c258067b094155af44e99 SHA-1: 3ee1912738d8548d7fa5c8057ed56c20172b3b2e SHA-256: ce2c39763854cccb8b85d99bd2f7633728d0effbca2b226bbec6b6f4608e74b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://almuhja.net/ckfinder/userfiles/files/61706134756.pdf In PDF document text
    • http://local-minicab.com/survey/userfiles/files/61848719883.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/kubazezi.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/jubeg.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/jemokikur.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/vu5cvbog2qo9u95kf706jt9q69/gusujidomesarej.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/66233022015.pdfIn PDF document text
    • https://kermanrooz.com/img/files/pudemoga.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39d73afba3---25114370736.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/detogudeziforazifuxitazaw.pdfIn PDF document text
    • https://appfacile.it/file/56624138897.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e2d46c89c744e1f6f88ca89b3f51d655/bujedibilugokobened.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/8131478263.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/i8je4l11vjt064csp74krj0eod/bebugifufinelivegilufot.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/5345087075.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/65435167585.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611855b4cafa0---gomegidafu.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/puvijajuxidanuxagipomu.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/34198705612.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/kebegagodalazedenazogew.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/pedole.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baadc7da07---xijotowijejeratof.pdfIn PDF document text
    • http://princeverma.in/uploads/files/takesosat.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/boniganetapoxujejosusuzeb.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b144866aad8---56107504127.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/35918719517.pdfIn PDF document text
    • https://aspirans.com/files/file/38881544000.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=demagnetization+techniques+pdfPDF 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_off0000b997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB997 11228 bytes
SHA-256: 58e7b82fe0e2ce2375332c054039e6def63bb5f52113e3db3b34d9a59d9dbef2
font_01_sfnt_off0000d338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 14788 bytes
SHA-256: f8e11c35d3e5663e7016d6a9e8e0acd852a5b82da77ae87bbae3445163d185a1
font_02_sfnt_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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