Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb048be677e6723…

MALICIOUS

PDF

75.0 KB Created: 2021-09-13 01:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c8e980178aea9389faca02196e0d54df SHA-1: ec2b7e9568a00a0ce0df4815d7a8ae543cadcd51 SHA-256: ceb048be677e6723474ad9e97b0e13cfe5feaaeb580274292eed75135a6bc57f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://orkoien.com/userfiles/files/25083410919.pdf In PDF document text
    • http://avvocato-callegaro.it/public/file/34681580491.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/najiwufukewosodoxedosu.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/zodakesebu.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/v9767i3dfujbcq46stskn80413/wemej.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a5f359433---kazegat.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/wizakedosebusidoda.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/sozumuboligu.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/midofugunobasixawojara.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/9072909276.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355759b92d1---95298033421.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/48451230517.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/titesivabulofolifej.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/legasexelojedijowuvinajo.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/zubuziwuxerovukisezebu.pdfIn PDF document text
    • http://standardamulet.com/files/files/57913049350.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ti0pkvn02cvht5n8k9te96mmd3/vitakutusafire.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/5706242844.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/bemetewopuronazigatadi.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/12820481400.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/99161062179.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/c02611gr6rtjf8rqnj42bgrl9h/47315975685.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/92224901116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=imls+hack+skin+mobile+legendPDF 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_off0000c0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0ED 17468 bytes
SHA-256: 468d549104d94b25f23157be5278d2faa75b33c4c60e70dc66812b467e7ac308
font_01_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 10800 bytes
SHA-256: 1433b2dd292f7e5a893b161e695ee18f7f7b4ae28f096fb29f2f96be89a386af
font_02_sfnt_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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