Malicious PDF — malware analysis report

Static analysis result for SHA-256 e121849a730a43b4…

MALICIOUS

PDF

104.9 KB Created: 2021-06-26 06:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e78b84dc2b17db5d195c08a3e9b0ecb6 SHA-1: 8667348cbb84a5d7c86679998009246f12f9e0e0 SHA-256: e121849a730a43b4c984cb9d9fd304418b2957578aa8eaf7daf9b83e3e4b5bf0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress installations and other potentially untrustworthy domains, suggesting an intent to redirect users to malicious content or phishing sites. The presence of multiple external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/df79d84a92d1286266ff563f34966f0f/93368315983.pdf In PDF document text
    • https://dineflon.com//files/89340144280.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/24768828818.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab300666079---xexewanatukekupu.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079a09200ddc---makifasipelikopowunibo.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/6b017d264bfc8ebbb8c3503c3941626a/kikopatadukazow.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082647767404---40791691515.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/51372884140.pdfIn PDF document text
    • https://securitydm.com/slicice/file/93623343348.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608042c8d6cdd---gijisonigibib.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/oomljm2hfnhijgc5ijttlqopathsno63/16152341657.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/29413cf7148895a8e073f69d208b053c/90719540041.pdfIn PDF document text
    • http://learningkey.org/userfiles/dawuxekejezilelutufo.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ogmbj5icdn7m1nsh5g57vhaue2/66874558528.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861af9279e9---refuposorivadisi.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/292fed2386dba85c4436b82859f577a7/49116520255.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/53cad5cbf713f67b920c4845b43a575e/xunozebadipuliw.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607233ea84296---jawalol.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795b1acb637---varanazom.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/64d8fcea246ec14677e11811cbd765b3/wavigumeb.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/sevidato.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/vazesexa.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/7608f974ff31ff4db1875ae22d8258a3/97378946668.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097776ceb6bc---84414765977.pdfIn PDF document text
    • http://promador.pl/userfiles/file/xigatexabulosomidesib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=stylistic+devices+analysis+examplePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001214c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13963 10812 bytes
SHA-256: e995bc060fa7590cd0bf0abe1decf5ac51b4cc63419769213d2de976c9575127
font_02_sfnt_off00015253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15253 16524 bytes
SHA-256: 8790deecfa1a2770d74e4384243f0af51f5c1502cc149f4a522f5255cbd11f1b
font_03_sfnt_off000168ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168AD 17664 bytes
SHA-256: f19df45739a26145cd38f00b3994f63b7cab0256283174846a249ff33bd07bdc

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