Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02f5d2f6170b071…

MALICIOUS

PDF

89.9 KB Created: 2021-06-28 18:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25bb093f7a91366c326c106b1de08ca2 SHA-1: 1bef55695791c034b9d821949a35a9e43fdf933e SHA-256: f02f5d2f6170b07186096192a8e62dfa96068f3d6112143012ba7e785fac6567
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, likely intended to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The file's structure and numerous external links suggest it's designed to redirect users to malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f89a869f14---85482412046.pdf In PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/bed3atjuudg5m84olfq07j1bok/40833220325.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/28295364119.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/60091310080.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1eaf24677---ratowe.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/wujesewokobopubunumuja.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/radogawi.pdfIn PDF document text
    • http://peoriamayorprayerevent.com/clients/1/16/166e3f524b51ec168ebfd48f86188a1d/File/pimelavebuxawakotopexu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1a2ff125e0e7709218bd79f8783c232/64453554926.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/suwikipolulanediz.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/51289052854.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb02b71fed---gapuvaburozawififanije.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/2b0fc681cab786d36973bc9ef04da116/nowoputixokemazowebavin.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/8m7aibt0h1rsn8heko4s34fmnr/rubanaxanukomulavaxoko.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210617_68F68121EE45E2C9.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bea4a93f2810e4026ff5bbcf2d83ea70/782759489.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/bezunuzupuji.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/eo9as6pi8a5t0kg5fr4qlq9g7b/penavosidukok.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2fac2835e---gulogabuf.pdfIn PDF document text
    • http://otczenacts.com/media/files/zajanalenom.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/68539529806.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad036f33853---gunujunebutuvowa.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/089s38e6bo5scharisfkg2t41r/babutemazunodew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=national+lampoon%27s+christmas+vacation+nicolette+scorsesePDF 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_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 18288 bytes
SHA-256: e4a3a4c329d1d2465f412f87a671ad1f2256c4528dd7f8a36a77dd35b189703a
font_01_sfnt_off0001291a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291A 10716 bytes
SHA-256: 64ddcafbfadb632a9ab51eef085f54b5b4904a6c4a2c727612e0d2b75c6d4d58
font_02_sfnt_off00014198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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