Malicious PDF — malware analysis report

Static analysis result for SHA-256 2419085004ed2e44…

MALICIOUS

PDF

85.2 KB Created: 2021-09-12 02:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c1fce06703eb7d2c879ed7eab31686ec SHA-1: 53cdfde244db22ab07fc92b4ebb8149fa5a33a54 SHA-256: 2419085004ed2e44d6ea3af97177c761763e7f2ba10048ebcd71dce563d49e9e
236 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, indicating a high likelihood of malicious intent. The document employs social engineering tactics by luring the user to install a browser extension or update, and also prompts the user to execute commands in a shell context. While no scripts were directly extracted, the embedded URLs suggest the document is part of a link farm designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://garglob.ru/uplcv?utm_term=how+to+change+where+screenshots+are+saved+android PDF link annotation
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/sibubejuruzimeseroj.pdfIn PDF document text
    • https://kiptep.ru/file/19344568490.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5349c6378---niwukibenuguwegag.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/gipudavojijafovomefeku.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/dabategelabupulifep.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/76266228729.pdfIn PDF document text
    • http://guowangcable.com/d/files/mijoku.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/6137b2dfd2904.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/16305981798.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/juwetumigiwejudi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d31778c2da---solowezimafurawadem.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73623716142.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/89839530735.pdfIn PDF document text
    • http://gojjang.com/uploads/files/wukagegebukazabot.pdfIn PDF document text
    • http://platcometals.com/images/file/69615019705.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac4556281---17785035297.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/2773330258.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8545dc49a291d6398c56c83c43a2a553/94383119075.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/1897064312.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/zixilulijorabilazosewibij.pdfIn PDF document text
    • http://vaynhe.com/upload/files/mugukosubebodikexigolawa.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/50469005717.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_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 19280 bytes
SHA-256: 15ad370dba0e4674ac214dad34bc74d3bd5d175bf0eebf5e2097a5a9c5fd8b14
font_01_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 10744 bytes
SHA-256: 50eda7cb5a1003be72804826af454029a9eb9e41b940acb046a5956d98ad0854
font_02_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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