Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d76ee59e603faf0…

MALICIOUS

PDF

84.6 KB Created: 2021-07-18 11:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d1e2e61fdf11561594c0505060f2d762 SHA-1: 018e53dea6e2b08999bfb0dd5892be1ca55f509f SHA-256: 0d76ee59e603faf0696723fc560eae2e1ceb790c814948ea22d26f22691a6775
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external malicious sites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hz-kontejnery.cz/ckfinder/userfiles/files/11995740174.pdf In PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/m3thlq93uc210rbnc4eb8jd4pb/22758192809.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/foxovikekagozulawub.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/34223354485.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/pefd5t0qlrh6cb5frl1tm15v7e/29827634528.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c70fcc06d1d---23656720479.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210716190057_4m7d67.pdfIn PDF document text
    • http://traviet36.com/upload/files/zugomajak.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092386c612cf---60188697459.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/85214422687.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/farigafifisatujotenes.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d659db1732---botoluxusubozekovimom.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/89592993709.pdfIn PDF document text
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/48886780940.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16094656743d07---14764071589.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609201be34e64---delukibokuxupoxavaporesex.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/81862215572.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/vofifuto.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/kulovoterumiza.pdfIn PDF document text
    • https://comiconfezioni.it/file/dudafelowokojamomalamafe.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/43065495517.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/pexanemovubabogufu.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/82802995918.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/74091a5ff6063dabc3e3e4a841669315/zixewabinebon.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5d9bfbefa195cc8a522003c4b2ed04b5/pubotesufarivesufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=child+centered+approach+definitionPDF 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_off0000e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 10580 bytes
SHA-256: b2193a650fe8cdf0664ef04f73a604d70d54de193a0e5a6b0d7701cbf7e6cec8
font_02_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 17224 bytes
SHA-256: f9b3c7a5a495c93fc5bd9bf48cda0e045ba4e8237492bde7f858d18c048fd4bd