Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb5b89ff31c7126…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 16:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd9f21bbd3cc4bd4844a0ebbdc4bfa13 SHA-1: 84f2cac7d510fb09a5e4445872fed8e96c5bf504 SHA-256: ceb5b89ff31c71269c6f42f766c315ec23407db6f319a605cb5e9fa71f109715
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=pettitt+v+pettitt+pdf PDF link annotation
    • http://damoorefamilyreunion.com/clients/7/71/71c8bb141a0941b69292984b9770a174/File/wunesan.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609863347bbac---51130492233.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/72600488135.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a0da0db44f0d071302299552fd1dfe4b/kudolupunegafewixokave.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/5f8c819321d486a8aa200a7af98b7ebf/tikisujepene.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/77628199817.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/gb7bo328fu9p4ljia3jbe7pfkt/51285988508.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/8211997295.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16105382269c97---sabadetovato.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/uhv052fs7f9v79p2rdis60veep/23288788195.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/81928430418.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16120f708796a3---80766170679.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609985e5d69e1---fagupewewowuj.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ac86c93d444819f5ae9d42ce0c4e089c/vadewetapuv.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/jujigum.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/20418744027.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/97309899301.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/54431649148.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/bunemox.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/539utn94lqapj3h767rtnm0v03/buvubofuzava.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd8d2b4c8a---94964657144.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/gixotul.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/nufudalax.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/suwolavuvupoxa.pdfIn PDF document text
    • http://linza-market.ru/upload/files/dedebamodetevewugenu.pdfIn PDF document text
    • 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_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 19192 bytes
SHA-256: c172639889ed1bdec17cd92a4a1f18ca0749b2ed628986e6c7085528b57ac5b1
font_01_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 9860 bytes
SHA-256: 850bae11c276bf0a21181fd614e9cff03baac5ab95757011b98a653fbc460699

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