Malicious PDF — malware analysis report

Static analysis result for SHA-256 f428bcf10e8853ac…

MALICIOUS

PDF

425.1 KB Created: 2021-08-02 09:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f993efcc59a5225a13e8927352866762 SHA-1: 8034594cbf51d8ddaa76255ecff8e274d8a34579 SHA-256: f428bcf10e8853acde9bded541ae9d8c503a9d3c80d19bad7989e90ee3e8e2d6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links, including one pointing to a compromised WordPress upload directory, suggesting a phishing or credential harvesting attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. The embedded URLs likely lead to malicious content or phishing pages, aiming to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier clean score 0.1255

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ketchas.ru/uplcv?utm_term=rubik%27s+twist+ball+tutorial PDF link annotation
    • http://beerskiboot.com/img/upload/file/75761400205.pdfIn PDF document text
    • http://cecev.com/stockages/files/kazibaruroj.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/42476749753.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/fulodovavaxarakaz.pdfIn PDF document text
    • https://elektrona.cz/files/file/34309266413.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3ce50c4db---23447697541.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/on8jaqj6cu4qdcnp7lqs40jq81/29680980691.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/ditamotaxezakunaxurinin.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e4ad35b9---86766722655.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/2d355cf8ba69b478601516aede09d59e/bigurumenexagi.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/pavejoxenapanidura.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/26256672251.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-28/20210528014415306619.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/neliwubutujoxizemoji.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/kimepuxagonojoxowufiluti.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ua2auetg68fha9icqkvntsdh9n/linerikifarunerufaxiget.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/54416155483.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/72917590498.pdfIn PDF document text
    • http://crm333.com/documentos/file/zefexuzatabarotuxisugesu.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/56727343188.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/246cns03rogma7172fphohd655/tidevamisudadisu.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/99d0dd52250ed51665cd58e55d024abd/gakexofaxetaka.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/kasunukevubikezasawene.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d56d7637---bomapezufovedonororarel.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/80722140190.pdfIn 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_off00064416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00065c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2D 10360 bytes
SHA-256: e179cb6a03615e47bf969659ffcef42cda331e6a7632f9e87fbb3ed3a099abcf
font_02_sfnt_off000673d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673D2 4208 bytes
SHA-256: 4f51823c3e67d21921e5028d2f18352d4210801a821fec784f979d58f8e74984

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