Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b3da701ced2ef7…

MALICIOUS

PDF

86.9 KB Created: 2021-07-28 05:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aa3fecca3f3ff0611305dc58aa9353dd SHA-1: 383416a7af6f37020f665469756e57d3839c7c1e SHA-256: 54b3da701ced2ef781d6a1a0768d35b2655defd0a396368dae77018209778cb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly suggest it's part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://miaousland.fr/ckfinder/userfiles/files/ravuvusujugamazuwor.pdf In PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/99675794145.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/28ee30f2b771a123147697c1f39d5002/20181464209.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/9325553761.pdfIn PDF document text
    • http://vanhoadautu.vn/static/uploads/editor/files/26784493497.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/minisorub.pdfIn PDF document text
    • http://grabnerestriche.at/wovibutidowotewojum.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xowazes.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e846008f0b6e0f052b55ddd6550f720b/fipaw.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/jb33sakvfpnk38ts4cl1047mo7/74005182049.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/45743279919.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/vujopav.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/8cc8ff9d6c83acbbdd96061d00fddbdf/lotupatuz.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/vokumawipigisulawizowoj.pdfIn PDF document text
    • http://accronline.com/userfiles/file/dofagile.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/50587338982.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/kibopujamivokizufaru.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967a4a04685---midirobenider.pdfIn PDF document text
    • http://normel.org/files/upload/file/vijudozaf.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/895945fa906e2c073d4e3b510e763e9b/86639979443.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd104174b---jiraterutagoxa.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/xikatimuzesameseru.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6f4d90a6f---rapabamumubozi.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pqca0nab3k9b7ej519f6scpia5/jusikijuwutetekal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tus+zonas+erroneas+resumen+capitulo+10PDF 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_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 10832 bytes
SHA-256: a9f9b8759af453b9582488a32bfc390b65ca37656b1722d9fd249bf81932e091
font_01_sfnt_off000106b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 17828 bytes
SHA-256: 99fee9d7ed7412ef2bb3f2c0dcc0c5d650c6ceda1484874b9631479306235613
font_02_sfnt_off000133e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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