Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3059e7f2c34b75…

MALICIOUS

PDF

74.4 KB Created: 2021-09-10 11:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c2e19925d03793ee606116fbfabb7c5d SHA-1: b33dffdffa5a35847e03049974eb60c103b0dcfb SHA-256: 5f3059e7f2c34b753bb5e1b71fdb97e8462b209df3e3a157e808647d9c13f96e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to unknown domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://veoguidecostarica.com/ci/userfiles/files/marugujixidim.pdf In PDF document text
    • http://phone-server.com/userfiles/file/fawororit.pdfIn PDF document text
    • http://alkanboya.com/files/file///25045024482.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/69692882764.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/16689088686.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/2110378365.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/90621668287.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/mabovomikamokofebobix.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/figalonamefepa.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/kudoxedusoxapetoj.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/36430950335.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/momowen.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/fozuwonedorafufolibi.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/47563455427.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/kuwufufasevoz.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337f6b9f9f1---38881061755.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/01/99994156169.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/29443556405.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109031307198035.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/28054452934.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16133edef25e2e---72682124701.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/vivijomewid.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/xelaxugewal.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/fepezekus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=diccionario+de+informatica+pdfPDF 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_off0000b7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 21000 bytes
SHA-256: a21c0537b8907dd2706d6a721221570757c2015c14c4b860aee3966fea409ad6
font_02_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 10568 bytes
SHA-256: a4c85ed2f7dd8af62eb727fcee268568b2d518ce4d840379ef94dde919e4b1c5

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