Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d4a2023a1a8d2f…

MALICIOUS

PDF

89.0 KB Created: 2021-07-28 07:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a3d75f719a4a8f8c14f648bac83dee5 SHA-1: 481b516d887fa29b7ed4579e8f2bf034aa69ac0a SHA-256: 00d4a2023a1a8d2ffe059c178d9fbbecc816d45ebee6de7375e25b437d0c65ec
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa6bdb8f6---lavekorewazo.pdf In PDF document text
    • https://777mto.com/contents//files/runivugenakugekugabizivad.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/83143178336.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/71503657263.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/31430824394.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5d09df2f---kubotegurozexixi.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/73569464033.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/2uqi6vlsgeuk0ja04rfe57v1el/49409548566.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cd98f383730---99393075890.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2cdfb3bade04a3723812da7c1706c14c/15772798772.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608098827338e---rolafavamoretezibabe.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/xifeteja.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/24054604744.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/nenapepadut.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/6slhob8hhike8rjjhivf1fb1kt/wovuzugotuwenuxedev.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/ratedurugupesor.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/63016490098.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/3aec9ea75c14e28001eefc455e8b6900/komumekib.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55d4eb690f---84992581543.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f478d66649c---nemuremamu.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/10330758342.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b94e0710e060d1e6457ce79bbeb00edd/vesadurudirajebesilaw.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/kefugogegumobawos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=descargar+las+cronicas+de+narnia+el+principe+caspian+pdfPDF 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_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001092e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092E 10700 bytes
SHA-256: bc4a5e77556706707c2f1ad4d524a7687d261256f8e69d699b56ea01a3041d15
font_02_sfnt_off00012196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12196 19124 bytes
SHA-256: bde547e091cbb992937b15f85908262f2da08f9c2647d1f4bb11e685be1af67f

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