Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8443e590ecd503…

MALICIOUS

PDF

69.7 KB Created: 2021-10-02 15:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8e7e702063d620bb7eb8a8731f661b58 SHA-1: de5d3a20d6bd42ce3590809ec19f2a9cc7190a85 SHA-256: fa8443e590ecd5035caa9b23623e4764018269e13caccd7c29d268891799ac55
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document prompts the user to install a browser extension or update, a common tactic for credential theft or malware delivery. The embedded URLs, particularly those pointing to compromised CMS uploads and disposable hosting, suggest an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://abcoegypt.com/userfiles/files/83674880338.pdf In PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/45124174704.pdfIn PDF document text
    • http://abwva.com/uploads/files/15132606961.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/neforuwipugoronin.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/jiforidupurepajuxe.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/15547874826.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c8acf80d01fbaf551e86fe1908e06b25/23959908750.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109191319056236.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/13067509106.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/71910520548.pdfIn PDF document text
    • http://zae.me/datafiles/file/nopowatepaji.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/72184948241.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/69461022510.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/risemapibifagujununagi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145372aef81c---67378844194.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/qc0efjoono93ar03u7cnn3jpn0/butugemagapuvokowojela.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/46549677384.pdfIn PDF document text
    • http://sushifactoryazusa.com/uploads/files/70274192494.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f77ee986a24d9594f5589a94ba415302/tikopuxugeg.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/gugeko.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/58016742137.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/13889909250.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/kijaz.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/78995591535.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/fumefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=private+let+no+depositPDF 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_off0000b0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F4 16148 bytes
SHA-256: 1eee005201b660d4c7feb9bb7f03cdcd476688f45b2a357d11556b4170c4842d
font_01_sfnt_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 10452 bytes
SHA-256: 5a22b1b5c46e470378f32f28ede26300637f0516f2660b254bc145e8a6a700f6

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