Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0f2d2ec932f829…

MALICIOUS

PDF

70.5 KB Created: 2021-09-25 00:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3b0d1a2110aff14774cee8de79c47f5 SHA-1: c81630ea0c235e985ce236a102b31a367b6aee16 SHA-256: fe0f2d2ec932f8294d6705ade4f9f53d6b8975f8801dd70ac63f28c8c8d7e22b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded links suggest an attempt to lead users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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://flagrant-desir.com/userfiles/file/47520959497.pdf In PDF document text
    • https://senfina.top/uploads/files/11519630558.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd0c770c55---18295925513.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/35362878078.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/84039652386.pdfIn PDF document text
    • http://artdental.hu/editor_up/42916612696.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/bixupevoboxadaxevaxom.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/75902572741.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/6981399682.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/nozesufowenubadupozo.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/jiwukimifuvorewemaxukedef.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/80518751510.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/d1784cd4ec6f7067f2c5109ef09e6abe/51318784654.pdfIn PDF document text
    • http://yuha.be/_files/file/fubelojaxiwunusawida.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2073ea778---72833046868.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/98727428979.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/xesigufo.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/jizisusosewuduleno.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385c66c98d2---lesazagazi.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/5568156157.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/78720238639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=wonder+woman+full+movie+download+with+english+subtitlesPDF 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_off0000af0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71E 16740 bytes
SHA-256: 7829f0c8b079b8bae4bd9c87bdbbad5d402b227bebf9a0c030b72493215e8604
font_02_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 11184 bytes
SHA-256: ea1039685291a2c935a2aa99cf511dc6448bb5addee6032afa4cba56c35159dd