Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce96ee2c47fc9f9…

MALICIOUS

PDF

108.7 KB Created: 2021-07-03 05:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1389cb36b1f4ebdf39d40e0036367d33 SHA-1: 684afff59b872c7be1f05c2bf8671998bd5e8487 SHA-256: 5ce96ee2c47fc9f913fc914aae28003b7b050d52088dc72f2d319bdc86f3207e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baongochoa.com/upload/file/76583104077.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/acb0c0839f720121634117f3cb9c8704/56987465998.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add5f47a739---sotuwoxulatowuforire.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a72ea2258dc---nikugube.pdfIn PDF document text
    • http://prestopc.it/upload/file/murofefoxovunam.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160766a1b51c5f---kagizepanixedu.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/juxuxufipurapusizolowuw.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608316eb9c07b---89215456902.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/gadebabadovasobejiluse.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce58c3bbc---noluxagipuleburevela.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/0a6f6d2bd8a3d088ba9eeebc27e8d41b/jefowuzorafo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab740c56851---46131872505.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/2ad432b311328ecaab4856c3baa3f430/lilalivigitivux.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/f869d40f339f55dd96a9a58dbd92339d/gagegevupo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e802b86a70---toxobawopolufukegoniz.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b7534e522---nobofokofepeponun.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/ncvcmfgjq62jutphkack8voejd/66768611501.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c72ec454f---26626572002.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8793e8fcb4---busewom.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ido1dn5nrt3csepvpsrl1kcmsl/60907001456.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd525039090---lojig.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c025ce1d8e3090c471d3ee87b6166404/11394841778.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c86d75f44---xagonani.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/44598670974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=mass+demonstration+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016f03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16F03 20648 bytes
SHA-256: ea35ba1473d641e6889830797785dd988f83461d8187e288b677b12d38d7ce12
font_00_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 25448 bytes
SHA-256: 1572e9ffd7a221a3c82300bbca3e391422d432ba94e59b6ca75a0fba9a0a2569
font_02_sfnt_off00015743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15743 10540 bytes
SHA-256: 441d8335c81b3c7abf863dc0b649b192e094f7464888cfe2cfdb6a59ef509955
font_04_sfnt_off000193ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193AD 4544 bytes
SHA-256: 629b1cc3c27516f8011e6cd564c529ef78a7784e91ae7a70fa91090f1afc0f8e

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