Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd24f25a5b1e2f4…

MALICIOUS

PDF

93.9 KB Created: 2021-07-30 04:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: ee3e56cdcb9dc6bb09ed189c7cbaf29c SHA-1: babdd806021b564252a999f1822f5af0ea02017c SHA-256: 0fd24f25a5b1e2f4bf0058d73ea3a4a90209774d236439c0f33bdb16d07bbc82
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a PDF document that exhibits characteristics of a phishing lure, as indicated by ClamAV detection and ML classification. It contains a 'Clipboard command execution lure' heuristic, suggesting it instructs users to copy and paste commands into a shell, likely to download and execute a secondary payload. The presence of numerous URLs, many pointing to compromised CMS uploads or disposable hosting, further supports a malicious intent to redirect users to malicious content or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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://np-laser.com/upload_fck/file/2021-6-27/20210627133634533731.pdf In PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0d17e6d7f6---rugedajivi.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/86360c4a09c12f0f50f91625ef64ca71/noxerumimigajuwok.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/62466594211.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/e25a0c9731a059e189ef51c297f84400/renaxuninivirexol.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce76ac5ce4---joxujifujusemukeronuv.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8a22fc7b---78070618654.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/kiluluvi.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/nakupukobek.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/f4c83de691a842ed8467e535e0179731/lavowebokerapivuzazin.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b66eba4bab3ec600a7df3f03789cfde3/19302091954.pdfIn PDF document text
    • http://hongdacable.com/d/files/4062076285.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1154c2c9e---29994544549.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/45ba7c9f92ffd33997674f78c0524be8/89758760558.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078883fc7dd8---zipofutelerufirowopu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a661337167a---84058399275.pdfIn PDF document text
    • https://digireg.se/upload/mewanusuvipez.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f18320c5473---somamebal.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0acbfb4808ab4f243b37b31f5e9e5216/95036044219.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/m9p2ntq33eiunv8uuh9mai888o/govifadilonokajalimi.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/tejotoxo.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c7d9ddc61---vuxosopalazitovoxivo.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051314372873499.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/bemikidebufakofisujavutej.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7575624a---wozidewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=active+win+7+ultimate+64+bit+2020PDF 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_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 29032 bytes
SHA-256: ed8d30cf2fad2aa41f0c488c71e9194affab8dca5b2acd3a9cc85d91dce6617f
font_01_sfnt_off000136b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC7 10916 bytes
SHA-256: 56b070bb6189ef3757c34f5851ac616abf51d3e568353aa8c81dfd3f748d9107

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