Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2faf2ca022a8a96…

MALICIOUS

PDF

67.8 KB Created: 2021-09-14 09:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1956f0dee4b075d5368e0ea283dab05c SHA-1: 31b7a53b137b39e0f22aac928011f6a381d823b3 SHA-256: c2faf2ca022a8a961042c51967484719efb67fe613741185aac45cdee0afe118
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to potentially malicious or link-farming domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613882f9abdf5---jisedixusokekuzetizati.pdf In PDF document text
    • http://tamlaproject.com/userData/board/file/71422800417.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/zusufiwapi.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210906_ED51EF533955219B.pdfIn PDF document text
    • https://hse.tw/upload/file/50054627726.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/zopuleluxinuxuj.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/73355913351.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/77232711498.pdfIn PDF document text
    • http://www.agot.pl/upload/file/tenifuwog.pdfIn PDF document text
    • http://ergakiland.ru/files/files/68729834332.pdfIn PDF document text
    • http://stringladies.cz/userfiles/10042972805.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/zivosafatapigukuza.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/88841634913.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/28511877948.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/74406538092.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/jakijujutokoja.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161400713b0d5d---nusabesal.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/guzotumozunexurelegibiwiw.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/15576609592.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/towunefojigufodugeme.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/8871658993.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/29433699375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=pokemon+go+spoofer+safePDF 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_off0000ad3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3A 10560 bytes
SHA-256: 339fbaee624e6a64c78899f2c7e935e9d608a0c9572bfa1454cf862f59e8ec55
font_01_sfnt_off0000c553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC553 14540 bytes
SHA-256: bebd997c43dbff7ad638adbb2f4b6d1e9c7e31dcc0ba07380fdf2808f0f9a906
font_02_sfnt_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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