Malicious PDF — malware analysis report

Static analysis result for SHA-256 edab948dfe2d6d19…

MALICIOUS

PDF

69.7 KB Created: 2021-09-29 08:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2603e429426ab6c33341a399696053b1 SHA-1: 5781c6cfb9763d4f81da27111d78e8853c7e7f9d SHA-256: edab948dfe2d6d19d6c3aa1fb455e72c7998fe0ecc0b4da7e8cdd5fb8d91ff2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings suggest potential for JavaScript execution within the PDF to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://medvor.ru/uplcv?utm_term=top+hack+and+slash+games+android PDF link annotation
    • http://chinamakina.com/userfiles/file/xarogakeziralopogef.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5b54c77e8---62985342472.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/84715845870.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/rexatekoxumap.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/54448158375.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16133214b526c8---78575617495.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134513f9a822---12549672310.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/9910366719.pdfIn PDF document text
    • http://tzsunup.com/upload/fewurizinoge.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/777226b5f5ffdd9b5bae2b393af4d4da/53013020005.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614362a00614d---68797528110.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/totoduzidofurelobumemuje.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/59275252128.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/57310504532.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/lasimuwivevira.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161481264893c1---makuwadajitabogodigu.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec89f98759---rubixapot.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/89553298958.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/vasika.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/48086838759.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/jusotojosimex.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/riravaradugedasivirogel.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/113efb5f9d250471e9bcd8ec99ab1262/jaxewowazewekimefe.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/dibuxijebazedodozomisep.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/99808890940.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/39727113260.pdfIn PDF document text
    • 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_off0000b21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21A 15028 bytes
SHA-256: 458ba8f64422a764c9151db7c4bc1a5ccd64debfc4c9c7438b70e60c4e488586
font_01_sfnt_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 10920 bytes
SHA-256: ba27c3d6a7f0819f8aa0a99936294e5328f5fddde9e82bcfb249b2ba8b03ebb9
font_02_sfnt_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.