Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ee9fbef8185b2b…

MALICIOUS

PDF

85.0 KB Created: 2021-09-09 10:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de198d153bca81954ccad6d8518d51b9 SHA-1: d7ce7dc01b52d0ba581e3bcdea601be2eff546c2 SHA-256: d2ee9fbef8185b2b2ad218b33814bd8fe42213a021ab53402e7941ba17d689c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=gomovies+tv+shows PDF link annotation
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef8f348bc6---wowekesogat.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/28910897754.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/ximerisakesig.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/rotopobewuvenagawo.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/54150a561fd5c60316bb16d52489f5a5/6110565099.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/vafomubex.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/dematazefugewodix.pdfIn PDF document text
    • http://www.ghidmariaj.ro/app/webroot/files/ckfinder/userfiles/files/51723234031.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/280914093.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/94480708455.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/69607063423.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/2327786699.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/walidonejugigewulurubunav.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/bimup.pdfIn PDF document text
    • https://afayl.com/userfiles/file/xuxomigisenozekapatewux.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/xojumixuxowulapat.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/bagobajefepobinebu.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/15444004314.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/gututef.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/rikuliwuwozuxomowarezajab.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/20159322158.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/91433065125.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/92842360577.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/nkb0s0j5jjeqn5kpo8nbl1eqau/vugarojexenefit.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/48571641234.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_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 18172 bytes
SHA-256: bebdc35aa7a6ce59c0007489a41224533eafc2846b88464145583f9069a66b5c
font_02_sfnt_off00012fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCF 10152 bytes
SHA-256: e219110cff4a600e753f443ad37c83995ab82380ac624bfb7df6cc49e1ed5af7

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