Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4eb85a2a1f8d6c…

MALICIOUS

PDF

88.4 KB Created: 2021-09-08 05:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2d2d1fe014740d367ce799629d165bba SHA-1: ccfee30ce6d5cd17b551999983b4c9201d94057c SHA-256: eb4eb85a2a1f8d6c2e0be18acc4859da4fafe2ff007a61e4dde5b2a3a8a4cb14
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://www.larche-de-jules.fr/ckfinder/userfiles/files/92710517881.pdf In PDF document text
    • http://e-hematologica.com/users/file/norefozijilemumerovo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/f3ca0dc8cf305be43955d2c0cd0f8c2b/zavemububop.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/In PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/4183f5a20ba86707b94db21723a59cfe/fudetagemiwixax.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/2514179656.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/19087706522.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e39176acaa9---77368010027.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/eimep7fft33rsi6p3bdoqr6mf5/zukiwajavapomutafuxujitu.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/zemuvosozulaxatusiba.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/tifolikanu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161326da46e46d---98187225282.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/90019120518.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/53e8bd275b0a403de19701a6a4be0960/wirudanatuverirezixumubeb.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/wizugusamewuzozepox.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072148ae2544---69972460722.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/69f4c392c8d90fda4248ed949882bb6c.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/afec8994127a858be96f14e14becfabc/92672246214.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/fipasewinorivawosif.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/86873651726.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/85364757640.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210819123209.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/69809862814.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/2eff84df147ef5d85dd60ee072b66c49/wejakoketi.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/82776911456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=araby+short+story+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_off0000f4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 10456 bytes
SHA-256: e2931c1a81c92532a56eef198745398076d0f9ce0d79d5b3336e67f56dafe62a
font_01_sfnt_off00010c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 18152 bytes
SHA-256: 84567b6eafc322bcab7e92dc474862282284e2e4e929b6185bca281f7b9066ef
font_02_sfnt_off00013be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1