Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e37d846b9228bd…

MALICIOUS

PDF

85.9 KB Created: 2021-09-16 15:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 01d03d5627a3646c468d09b3ae04e795 SHA-1: f32f1fc3b7e0fda057f1aab3dcd196445727e1a2 SHA-256: e4e37d846b9228bd2cc69430bf8fe927565ff28c0dae5ed909156e2a22528080
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The presence of a link farm with disposable hosts and a URL containing 'download 8 ball pool unlimited money' suggests a phishing or scam lure. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shinies.ru/img/lib/file/lepep.pdf In PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/16859483800.pdfIn PDF document text
    • https://posh.hr/files/rusodiriwezasisenu.pdfIn PDF document text
    • http://teifsepahan.com/files/file/19309613059.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/pemalajeze.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/sisibejukowujodudunupip.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/zovabejese.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/fowum.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210914180457.pdfIn PDF document text
    • http://c-six.it/userfiles/files/pemonifenotororilawipovo.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/mijit.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/nobujuvadezoxawakiges.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ec1fea13d15788c7e874ca934c0b75e0/38714116178.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/88575395125.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/61735786276.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/64682075092.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/zidamag.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/degafinaketarekewetibof.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/20943807817.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/4638733968.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e29cd6b952b0ab80de2c55fb4871bf82/75998763030.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/9231989558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+8+ball+pool+unlimited+moneyPDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/26329121344.pdfIn PDF document text
    • 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_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 17476 bytes
SHA-256: 2c8e98abca6904763de750e4f41a909f931d6665a02593d09ab3896b0bc7598a
font_02_sfnt_off000130ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AB 10936 bytes
SHA-256: 902f6e6fce34bf421892c861ea0d07fb8a2bb14d099e59edbbe2aa02f5a8eb4d

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