Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29c66a41f7d2754…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 04:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: c7f209818ccbe8fdf210bad89d38c53d SHA-1: f1389553db0d023269f25f191a016a7377952dbf SHA-256: e29c66a41f7d275462c65c2aa65891e53c6d4e46daa72a62c1645f00380e46ab
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059 Command and Scripting Interpreter

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure and a LOLBin command-execution lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://xn--p3t29jo1ed4o4xw.tw/upload/files/dixixumujarapabek.pdf In macro / runtime command snippet
    • http://www.masozilina.sk/ckfinder/userfiles/files/82029352998.pdfIn macro / runtime command snippet
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/216098ba7e903d8f865f62fafd135eaf/jabozagoxo.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/763440652.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/li2t94q4tdvrquf1i4b5j7crb0/86660645408.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/sadakijexavitelefazujifaf.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/15001175355.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210708_E478A86AC0F29D4A.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/fd91e22c81b436b0d7769a43d903423f/lamimera.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/22898437156.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/cc49faf639f811ed1c5a0a646705492b/geperovumik.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/8220297234.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///kodapemijasexodafur.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210708064556_otg3ij.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/mupefawomefevib.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/54259458260.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a8671dd1789---29018090879.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/62115833839.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/ripunej.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/da9e9673a0e33d21790980ea4821ab7a/20821669789.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/64989325460.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/bexikejubovuwab.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20210901file///salifaxamemo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df651d3fc6---84127538011.pdfIn PDF document text
    • https://badoza.net/userfiles/file/7616457932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cmd+commands+for+wifi+hacking+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_off0000d895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 11000 bytes
SHA-256: 30103845205b7ece4c24800a1fc4d04e848693385e84eb4f2efe4eb3fcc47c51
font_02_sfnt_off000109e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E1 18344 bytes
SHA-256: a59da9d4923b5b0340874940881e266a5006fc3b55ff26b24aeb8ab01f9a8c3d

Open this report in the interactive analyzer, or submit your own file for analysis.