Malicious PDF — malware analysis report

Static analysis result for SHA-256 030eb4bde314df2a…

MALICIOUS

PDF

103.2 KB Created: 2021-07-05 22:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d18e3bbf4f7041d0493764b95276bc19 SHA-1: 5917b0c5ea20a0baa5f06adbc13b2b33949958db SHA-256: 030eb4bde314df2a0b0612e92bc1e1a6fdb7bf3581be1ad56bbccb5dc13f3b38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing websites, rather than delivering a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://malagi.pl/user-files/fck/file/57933674045.pdf In PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607720e267ee2---mifob.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/47iesau68nunofclhqde9v752d/lobegudasiruniniv.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/nnvgm2cf5fged38bn42d7gu7l4/rikujigiwibaguranowidorur.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/98b86fafeb3a2f01dd387852b3535b5f/96835202519.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dfade44fb2f---61693496951.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/88352056084.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f913bb90841c1130c60f097f6b040b59/xurofegolazolukejido.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b195dbb03cb---19990970679.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/da9084f4492a8868fc7913c6db78a840/zitejavagijumuz.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/vofabazoxutal.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wurusosuladotalenujol.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba3543c846---35468089401.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/rikav.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/gafobebum.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a2c3b5a50---14417961864.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/kibugevobikunimupemafav.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608843367cd8c---15539342702.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608436384a84a---vuwoxakuf.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/293944ff3d3ed9e7310edeb161bc02e7/gabinimejalobefusukap.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3sot435venf5751gganh49ln30/63773143430.pdfIn PDF document text
    • http://www.bash.cl/media/file/dusozitibifuvatadak.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a61f4ce760---94955322742.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/sofikotewewanofuvase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=my+florida+unclaimed+moneyPDF 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_off00012fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBB 17700 bytes
SHA-256: ea3d86a3607920a7309ec631c098837df77340dd2a30c9d2f5f5edc54abe1933
font_01_sfnt_off00015dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17615 10580 bytes
SHA-256: 34de2848c205a2c62e01f03971f3e26e04594951c5637fd8bfb71c9f99287eca

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