Malicious PDF — malware analysis report

Static analysis result for SHA-256 572312ba34f152fc…

MALICIOUS

PDF

85.6 KB Created: 2021-07-31 02:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1a605ae8ee7e0a8fd38aa50a268ebe9c SHA-1: 60b176683ebbc8179d3e83be991e1eb7005b0d08 SHA-256: 572312ba34f152fc2adb0098b84940c6fe9636522a52e198b5ea9bfa0c693ce6
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, and exhibits characteristics of a phishing lure. The document prompts the user to install a browser extension or update, a common social-engineering tactic to facilitate malware installation or credential theft. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://philabc.ru/uplcv?utm_term=how+to+restore+deleted+chrome+history+on+windows+7 PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/zasakotaxomukijite.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe98a51f156---30316452145.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/14640070678.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/83456756311.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2cbd3d9bcd994467c38bef78d02a68bc/28636403159.pdfIn PDF document text
    • https://best-label.com/upload/files/91134854201.pdfIn PDF document text
    • https://go2germany.ru/files/file/samirirosigozovobot.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/soraxesiju.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d5ea5c14f---6585929524.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/61d1d3cb5f95057f0ad9f94ca26f9166/53515807621.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/mumujumunobud.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6135d884bdd8ac245fc21617066c0916/nofetilozazibatara.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608453ed6d760---48748117486.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c499913929b500b961ceb8eb228d5d0b/45979155335.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a49f47ed40f---78887014055.pdfIn PDF document text
    • https://iwistw.com/upload/files/84164777926.pdfIn PDF document text
    • https://yellowstonewildlife.com/98373988629.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/08gccdckqi4nhtuaj57e4p5g44/nevovezekaloxijixuwolog.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/relurewafomefomojewoxawul.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160db00a777194---jidojeroz.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/38707505191.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 16844 bytes
SHA-256: 178268534e05a4d6d03e85fe1be7321542f46432c82501b8e1e4cc0b0e466a49
font_02_sfnt_off00012f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6F 10716 bytes
SHA-256: 9dc1526de4a95ea96b0a8bcf93f8466e2402b62c3eb1b43b490df9bb833b4c53

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