Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec27474812d8127…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 09:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6d1319216c08633a9804b5f858f7c066 SHA-1: 00d4595a7c42c4f427410afa6aea7d0e21546cb1 SHA-256: 0ec27474812d8127f17bf435df78a540dbc97fd405dd83099be5386c1f68d69e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous other PDF files hosted on compromised or disposable domains, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure itself is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://worldtile.net/jangheung/userfiles/file/59506171775.pdf In PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08baa1825c---18911370293.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f40ce4cca---muxamunapak.pdfIn PDF document text
    • https://asiabiru.com/contents//files/gatumizixirumo.pdfIn PDF document text
    • http://waltripclassof74.com/clients/8/87/875eff38522a6836d9fda94c5a2b6b26/File/7775931479.pdfIn PDF document text
    • https://aokman-drive.com/d/files/52555082013.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/8bgcmfs1gtq66biaj88relhngs/wojelexogex.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/46411077838.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/zidus.pdfIn PDF document text
    • https://paperland.bg/uploads/file/80089415622.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/59611433963.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/guxaterelotexituxakekajog.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/80465259790.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e710a7201e---miwumugoruguvej.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ptf5n8s5477lagglt9lb71cuvu/46265114115.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/vifape.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0421d2dbb---dimumitajegebewir.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/47251077602.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/xifuxapideziganinene.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/04bade8ce3d90410f37179d0d215e394/dipuwilelavazok.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/f5838e475e6459c2cdba86c48d98e929/88337488166.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/regutilifaz.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/jodomerizaz.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c6c41e261---34384078393.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/59030654877.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/87590122626.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/wimokifewajonukubus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pseudo+hallucinations+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 10816 bytes
SHA-256: 278d16bdb68761160cd311ba4fc4cce61ea673b529fd06cb07fe83a27ab7331c
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 17020 bytes
SHA-256: ec2ce06e30a88acb01a358745d172d1f4130eb0ac7814427815552c753512298
font_02_sfnt_off000122b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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