Malicious PDF — malware analysis report

Static analysis result for SHA-256 be422fb3ecd604b2…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 11:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01459062df735078826790cba42d6d87 SHA-1: a2b5480b34e5b45c065379cf788e32b1088e43a8 SHA-256: be422fb3ecd604b2d1b0da4d1ba7cb9632d1910395c9bc274008c44a1e39a074
196 Risk Score

Malware Insights

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

The PDF contains a lure to execute commands via the clipboard, a common technique for downloading and executing secondary payloads. Several heuristics indicate the document is part of a link farm hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://onlinendttraining.net/files/jonumixapuposed.pdf In PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210608_F07D14DE8745691B.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5b7fekqbl6nlbtlcso0ku0uq43/fevezabizimidukirirazami.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fda1f4a0---96467116612.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/2235186044.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/71819015705.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/penenedozurixu.pdfIn PDF document text
    • https://drsaman.com/files/83693893774.pdfIn PDF document text
    • http://ewtch.com/upload/files/28070484877.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/ronusepadasifagokesolavej.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1bd30043fd5dec8cebad4011df3f3be8/80236953516.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106091244018755.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc88fa0990---tanuborizibu.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gotuvuwuzozemofapidaweviv.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/98000126878.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc792190c---30030667598.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/95154018933.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c31f06c18e9---73042092195.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/19481964783.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/b94d3ebc6eb38120a0294609b5da39d8/50903662181.pdfIn PDF document text
    • https://avenue102.com/uploads/file/pejosowumixuk.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/mufapifakenetefepenewa.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/15176543961.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/69036510307.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/sabuvobedilof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=it+works+book+pdf+free+downloadPDF 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_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 18328 bytes
SHA-256: c858bb5e72a2090664f3481bb46ac326b8d95e2f13b7162377c94979beceea75
font_02_sfnt_off00012cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC5 10668 bytes
SHA-256: d7d36db95ade8434fe830c256dd611df890c3ad8d7b38934e2805e09e3ba42ea

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