Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eceb77d133b301b…

MALICIOUS

PDF

71.5 KB Created: 2021-09-28 07:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3d15e68dae9489a98a7a56460dc98464 SHA-1: 4987ee3f4507c02cdb3945d009f25233bbace1d3 SHA-256: 0eceb77d133b301b4da918778aea28a8085b2298fb6a436d5374e2267097bd20
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The presence of numerous external URIs, many pointing to compromised upload storage or disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://aspirans.com/files/file/68919147697.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161524686b98e8---wonakujagosogevasajox.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/voxidonivimutaramadeburu.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/bipixosameretezed.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/fasonidotib.pdfIn PDF document text
    • http://cobweb.janci.net/upload/files/fapujonidunopogekotogomof.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/14387216698.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161458823b9513---jajujoxewikimuwanadipemoz.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/kukuzutajilidon.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1e83c69f9---57707712111.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133bf900538f---sasejipixorebukupaz.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/nusamotozuniduw.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338b00db869---8174904898.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/moporubeduxezox.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/70209307202.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/durano.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/50249549629.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/82904312568.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/22480206840.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/wosapagiwuxovuvijibiruka.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/60251470234.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/1522411628.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+teatv+for+pcPDF 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_off0000b454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB454 10508 bytes
SHA-256: addee4fc683ed7fe89d5caa71cd1791efcd7e0272f68b03964f38df9c955953b
font_01_sfnt_off0000cc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC65 17348 bytes
SHA-256: b666857c18716397db509353ea9c468bb18153ba96b3945c767ce82470b890a4
font_02_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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