Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb6484ab8f4ff10…

MALICIOUS

PDF

72.2 KB Created: 2021-09-03 04:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38728bb9b917422c4d8369dcb02abbf7 SHA-1: 4968b9619bdfac2df408b8653de78bc2462a81cb SHA-256: 2eb6484ab8f4ff1038d4a705e778efe50e364eae2edd383a8d326145704b6b56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. This behavior is characteristic of a link farm used to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://prograsifkalip.com/files/93777628525.pdf In PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/41000765205.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/dibudorikokive.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/69275805843.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160780deb99b98---26440951922.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/32487434584.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612b57b5291d0---popukozu.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/nadoromelerobaju.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/zilalabepuxejalal.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/msqolkelgnpgima5ltvooqfenq/80448075110.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/52164764981.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d91acc322e---81150671669.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160adf9a44273c---95398385999.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/71973279032.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/sitipixixos.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/pexodezigofivum.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/muzinasipasanonubowi.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae452ccd61---rudalilujole.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b248449d584---39885875255.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa6d3a9045---xaboluvebusigasubamos.pdfIn PDF document text
    • http://techbis.pl/files/file/genumovivupufotod.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/xujezuvebivinanuwute.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/42448047296.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/pavulosiwitufufabidu.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a3b52c668---25918149210.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/7645217292.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7um11cbs03qhk6v23pull0in7d/87488370189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gadamer+estetica+y+hermeneutica+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_off0000b8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E7 16100 bytes
SHA-256: d4b0f7c16f405914b97dac3c5f458cc9519edb6ecbe978f0082cfc5ef50aa62f
font_01_sfnt_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 10972 bytes
SHA-256: 61b84eb81b542349cca75e3544b1bbf237a78d953e97177bab0ed67d3a046ddb
font_02_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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