Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9bb6c54429848d…

MALICIOUS

PDF

73.7 KB Created: 2021-09-01 23:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 520507cc4e7b6c1c2e25eb161ddd7658 SHA-1: 239e0deb9d35c1e2e922f7c19dcb7ad2eef15ab3 SHA-256: 0f9bb6c54429848ddd7b719f2f5f957d9886d40cf5801188e29e85f807bca397
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs pointing to link farms hosted on compromised WordPress sites and disposable domains. This indicates a phishing or malware distribution attempt, likely using the embedded JavaScript to facilitate the download or redirection to a malicious payload. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dgjst.com/upfile/file/xavurajufasewuleni.pdf In PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/xelakogezobeminejukeb.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/6351224210.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/pubu5342smktpbj9mrd8vtulgv/baxiguwisimaruladi.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/87728889494.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/titumerazenubowi.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d4b34eb8f---23046533577.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/zalosubij.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/42944453011.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/visakakavexunuze.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/fisotuwixumiji.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7f4b3c3de064941e628d21c94e8ed0f2/79119764263.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/laloxegarapenudotixami.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f270931984---67971180590.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a789d9341ec---jokipepanidijanur.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/jefanafavaxagesatatabep.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/0403e9519132385626637e7a29ad6aa5/29502701775.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778faa5a086---xakaturoko.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/aef8d39105c69051cd86290b8a8e3dae/juwew.pdfIn PDF document text
    • http://sapaethnic.com/webroot/img/files/65431323446.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e61a9ce6bc---ratifef.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/20086144111.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/pjvpr159ce73rmvvackgahaosi/9354496778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+does+bce+meanPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD635 10532 bytes
SHA-256: b37802902830314458e9929d2d3e83fac37da03e36b368e46eb48e5ffaaacd78
font_02_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 16784 bytes
SHA-256: 9b4ce8df863f0190b1ae6081e4197e43684c03d47afd1c37031991beacf92617

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