Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2212fec9977770…

MALICIOUS

PDF

79.5 KB Created: 2021-09-02 13:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7f63615d29f792277a917601f0862c1 SHA-1: af4bdef9762201b0cb4a0868ed7602a783f96317 SHA-256: fd2212fec997777009e747f7797915fed070b674b9d92ff203388d3085eacf1a
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 contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or redirection service. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://synerhu.ru/uplcv?utm_term=nrbc+manual+calculation PDF link annotation
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0af19b86a9---80967803372.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/76b95ab5d999ef11085f8c177a28c97d/84465241200.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d75df05f4---63061021589.pdfIn PDF document text
    • http://zuche0551.com/upload/file/pifojo.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f59d93776c80afb5d9fc5ffe9b0937f/77166117411.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73c7b509e4---bonidek.pdfIn PDF document text
    • https://impresa-valli.it/file/kuwil.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110f5243587b---89829966722.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/kopexovafi.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/b13c5390ae3c142c65fd66c605ba6ae9/19517529307.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/52757985659.pdfIn PDF document text
    • http://servmed.net/userfiles/file/dofifotodufutatov.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/vojamozux.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9c30b02a---50696183019.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/xamepudagitesofawe.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/retuxiliwusise.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fa8be1110a9---50374006332.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/43173144046.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/4312957584.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c5054beb8e457a3eff0fbae9fd56da3e/noxafo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/9v5l5iok1mdp25novn9esqau8s/19267303755.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1f8a78693bf4b2f873e4205573f7a582/72148631065.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 17672 bytes
SHA-256: 1ed7194b28693f5b0598549124f11371557426a1d70c3a6e2351c4a8dfe289cb
font_01_sfnt_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 10308 bytes
SHA-256: ed6e3c9e08f9184f868e66332928536f27f37ffe8352eb375a7956ab1f804db2
font_02_sfnt_off00011812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11812 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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