Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea091604214fcdc…

MALICIOUS

PDF

72.5 KB Created: 2021-09-17 08:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ba912d6072d3c06a2a574918e557d845 SHA-1: da709c24fe11a925928548fbadee3e1ed1299301 SHA-256: cea091604214fcdcef61ccad57a7524d06ae5a85319b1b69af02a8f31673948d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, with one specifically advertising a download for 'gta v5 files for android', indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://cructi.ru/uplcv?utm_term=download+gta+v5+files+for+android PDF link annotation
    • http://miskolciharsona.hu/pictures/file/deziremefemoxefoko.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4eabfd75b80da87ed98039bc349d3623/fixigaz.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/tolemaxef.pdfIn PDF document text
    • http://scsytech.com/upload/files/23621205554.pdfIn PDF document text
    • https://ijpdua.com/contents/files/29465870008.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/neguvaduxuduzatenerep.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/29348218465.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/siwegowatibisuso.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/3726585415.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210901200118.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/nalipojidokevobawajivojij.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/legepexerufikisomukor.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/sopolexorudukized.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/3698946008.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/vupega.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/96698803148.pdfIn PDF document text
    • http://talesma.com/E/file/tajovoliwaputep.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161386b695d641---lamejeputezaf.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/wiwalolo.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/24535360004.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/parama.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/36560598108.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_off0000b8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CA 10816 bytes
SHA-256: d38494ff9ca385b7a9b9b5ad393c023256738f26ddf5e43f09beb2f6549ec039
font_01_sfnt_off0000d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C1 16476 bytes
SHA-256: a363b2d105c8cef5fe00328ca25e0f00dabafd16cef7732b3b95280b1c70e7bf
font_02_sfnt_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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