Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d47cef96bc6e0b3…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 09:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b36e5bb6d529671057d2f63b4364ecd0 SHA-1: 6c5500ea7a3594485d07580c31bbdb50e3a54083 SHA-256: 2d47cef96bc6e0b3fba7db3544cdfaf7b0392ca54d49d19783a58b39ddfb98b0
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs and the PDF's structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://5lovestartw.com/CKEdit/upload/files/milalexazasa.pdf In PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6d32f32a6---gasenubite.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/92124544133.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/85111430052.pdfIn PDF document text
    • http://metapolar.hu/tmp/3277002362.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/sekudemabujigusukaxilo.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/pudefodiwunoj.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/doreredewepanaligadevu.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/92402717895.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/92167889065.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/juzido.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/27290409432.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/161333b4913eac---96141330588.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/sufegudesemomitagapa.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339d2edbda2---piramozider.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e8604a38659a82395d16b4c935addc47/wewijatumudusi.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/98630764689.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/55671444501.pdfIn PDF document text
    • http://aven.su/userfiles/file/mafowojilodufob.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9a8eb4b7d47f6fa9c6fed47ba837eea8/vefatoweripimutawu.pdfIn PDF document text
    • http://elpijisystem.com/file/dedam.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/zipagafolabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sistema+operativo+android+y+iosPDF 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_off0000b242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 10764 bytes
SHA-256: cba1e840b22bf9cd67f077a726cdbbe37f3dff0903e80eaa818db95789dc5207
font_02_sfnt_off0000e31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31D 15040 bytes
SHA-256: 0c16bf17a3c4ce3d198ec3c677a076516739c5f64f19b4ec1d8caf5e47723fe7