Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc49acf110ed5aaa…

MALICIOUS

PDF

89.0 KB Created: 2021-08-25 04:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8bce5d9715f5849490145c8a763f1387 SHA-1: 13c93746c29c05a522b698acc92b940f258b9ab3 SHA-256: cc49acf110ed5aaaf19e7f93a41b71ce1e47a7e9ade7e5a8e82d559ea883f794
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of multiple unknown URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5dc37bacf5198198b9af6e8e13ce38d7/fudevadelu.pdf In PDF document text
    • http://batiment-tunisie.com/userfiles/file/76143595849.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/tefevadijega.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/mawezubi.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/tgrf11jsmkovs1ms7ubhm0fq12/93105896741.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097c792a3483---11471210169.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b095a0c1443---21022716950.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/93632435088.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/47369206419.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/felojifivojesu.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160732d9935204---mugebapobipipozezarer.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b9dnncem1pe7rac52flt3qon0/tisozini.pdfIn PDF document text
    • http://garderoba.sk/images/_file/79629825637.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/63224031475.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87605503581.pdfIn PDF document text
    • http://vo23.ru/upload/file/kakogisevidup.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/nonenibikafafi.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074d202ed647---48237521918.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/zunedu.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609472ea2c81f---37770050084.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/7325eee4390b36212108ec40454d142d/rilusexusiginelinevuzoti.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/worutujudodivek.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202108231008206466.pdfIn PDF document text
    • http://ud2-140.com/files/39532040237.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/zuritanaloderujufilovomiz.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/83piguucsl9dkocpp0n4ahhi2o/22962230068.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=being+as+communionPDF 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_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 10480 bytes
SHA-256: aab961c5710067abeeaef5580dc6ca33d5dcf76022c7c4aa37e3fff864425411
font_02_sfnt_off000125c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C6 18260 bytes
SHA-256: fa1d2b724909a80bb7c8a42107fd4ca2f7a3d65824954afc75d9c56772860b24