Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b95a05a7c079bd…

MALICIOUS

PDF

83.9 KB Created: 2021-08-24 23:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f66d66d3ae92eacbf028e614c62bc31d SHA-1: b50b759dc607973ee03f1b1e142e4cd52924f3c9 SHA-256: d3b95a05a7c079bd72b78cc37fe6951c4cd4938057099035f53befaaf061eeb0
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF was flagged by ML classifiers and ClamAV as malicious. It employs social engineering tactics, specifically a 'ClickFix' lure, instructing the user to press Win+R or paste commands into a terminal. This is a common method to bypass macro restrictions and directly execute malicious code, likely to download a second-stage payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://hitpoint.tw/userfiles/file/pejamadajatelorediseko.pdf In PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/40b5aed06387b538c8c2a2dccae8a92e/fapatupeboj.pdfIn PDF document text
    • http://realloans.com/clients/73966/File/10901769442.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/7c7149bfecc4abd6f597c491eb23f362/47743722212.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/6b7eea0d19125427e45ae2387c2666e1/7427446968.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/rowesod.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc9f1ed24a---falokatomolok.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/paxaxelogebox.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/tovekudupeponewitomo.pdfIn PDF document text
    • http://www.christianhouseshare.com.au/ckfinder/userfiles/files/45849062293.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/43188916040.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/33185883247.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c67efbf512---30304425034.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/90c50914a5d1eee49454c5a6742d15d3/fokirasenexureno.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ec93b8935---91132980995.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/wemuwopezinod.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/luzuwowis.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/bikowakuwabojido.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/42402748051.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/togakufefuxikugubudokili.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/73953606715.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/dhgp0es4ksa2vbeecm32rgi7i0/lunikiximekujibukewozug.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/27d40cc509e84b6a30aef5e2908d748c/ribinemolotekevugumixuji.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/p3hmd03ahjvtm8997eg46652n0/nuzudotuzafoxodusavesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=all+command+prompt+commands+windows+7+pdfPDF 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_off0000e2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 10768 bytes
SHA-256: c6c9db7880def16d4e9aa49c9d9948ab16f5a20620f1a08eddf24e87698f32a8
font_01_sfnt_off0000fbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 17000 bytes
SHA-256: c30088a0ac91e35cb1114c9b39869e1dfa6ac8b70f27feb233eed1384775d018
font_02_sfnt_off00012852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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