Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc2fc947c9478d6…

MALICIOUS

PDF

104.1 KB Created: 2021-07-31 17:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c8350215069875872fc42787cc84ccae SHA-1: 6bc7d58f1da19184bef521032121ddbd4de61537 SHA-256: 2cc2fc947c9478d642e99a5b1a6f6d9e9f0c90f839bac71301bfa4df527ffb1d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits multiple high-risk heuristics, including a browser extension installation lure and a clipboard command execution lure. The ML classifier strongly flagged it as malicious, and ClamAV detected it as a phishing trojan. The document's structure suggests it is part of a phishing campaign aiming to trick users into installing malicious software or executing commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 9

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://ambulatorioveterinariorigolon.eu/userfiles/files/35004834854.pdf In PDF document text
    • https://tomas-music.com/contents//files/jajutiliwexedovusezetol.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e553ab162f---kakomemudexotapuvosag.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/nubofewokalebijogebad.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8c6e2126de1b1eef53870e8043a206ff/88118617469.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/3ildp8469u4smvi0rhjm49hm14/20979940819.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/d367a681d7cc9f388a12d3de9269368f/67467421306.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/davubevogepofedabiwapuwaz.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/46065912898.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/wipipogureli.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210709_B3FADCA6FED47DB4.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160928f71ec1e9---pofanapiderilozigifirovi.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/97758944866.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/28265266296.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/xudotegi.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc3ff7fa22---xifowimajunaduwati.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/2990d76e23482d83a1b2705b428579a7/20717436212.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da27b4dec4---larakidavevibanofu.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/pojolezabuvufekigadalesuw.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/kiguvezifafojuxixamekivul.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/89092762102.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/0quieodq2tgtql54u8aq7d5f8h/xezolikax.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/sarolobewomenazipatilada.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/29991508877.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/31764140906.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/53600138970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=slither.io+lag+fix+extensionPDF 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_off00012c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5A 20384 bytes
SHA-256: 7cdb7f31220dba2108f93c7ac3541b61772b972e0b3aad5fc79c8b1ffb988f42
font_01_sfnt_off000160c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C4 10736 bytes
SHA-256: 8a90e0c04c13448400d6564507364f8a5844a0e25d7a61da2cf7d8f31eba0e44
font_02_sfnt_off0001796a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1796A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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