Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff62b6230d36079…

MALICIOUS

PDF

69.8 KB Created: 2021-09-26 10:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d52e3d5aaac3ceb9daf0e7510c9908b7 SHA-1: 0549089b2e953ac3ab47ae598d9e4bd71c0768d7 SHA-256: 6ff62b6230d3607939166821c88002875d37e7b1865a1145923b017e905aa6ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://topnotchimports.com/ckfinder/userfiles/files/papemijiwubetit.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a15f01544---kofovegawoxuwogivatipev.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/63276265464.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/31755090567.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fb54eb9e44---kodixola.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/8605050227.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/fulelodakekigojejubowem.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/84837779950.pdfIn PDF document text
    • http://szcftz.com/upload/19654676244.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/19508445440.pdfIn PDF document text
    • https://maria-galland.ru/files/file/73260787621.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109231702211568.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/piwapibud.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/guwaxetoso.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///64315928394.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/kodobexujakoketemu.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/vunepiwokibavekun.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/77017560675.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/16838904132.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/80053393786.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/16720021299.pdfIn PDF document text
    • http://rem-proekt.com/f/file/pisabik.pdfIn PDF document text
    • http://helices-evra.com/userfiles/file/movisated.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/43464632076.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/jegatopukatatiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fast+and+furious+9+full+movie+download+hdPDF 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_off0000b34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB34F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB61 14444 bytes
SHA-256: 2bc924d00457b0f76b8e472bcfdd71354245488c937bc5d1eb83ee5244ea3bd2
font_02_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 11016 bytes
SHA-256: 3ecb5ddd9212d0650424bd40b2d32908ea3d341cbe34247859ccc68c1c6e1c54