Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd25f418619731fe…

MALICIOUS

PDF

79.5 KB Created: 2021-09-18 21:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e1924f73f98a63858c5d96fa11701af6 SHA-1: 2059ccb1301444ad4bfbd3070c68e92e6c7a00ef SHA-256: fd25f418619731fec9481a526846a7fc41492ef34843a44072b81dd0d542b9a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a significant number of external URLs, many of which point to compromised or disposable hosting. The heuristics indicate a link farm designed to redirect users, and ClamAV detection confirms its malicious nature, classifying it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=hotspot+basic+apk PDF link annotation
    • https://12shio3.com/contents/files/lupibakamogiwitulisojase.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/sutawixeni.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/dujuwew.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/35537002632.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/8633490186.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/0a8958ce7d4ac9926e4d44cae9a75ad6/basolurufemukolezuzog.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/bvmt14ir8iephtt34ll04ikp50/getukadogonulaw.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/72231482427.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ba81cf554---nepudukarusowefat.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/13040940184.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/fotubuvabexuvopapipudavum.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/32482663225.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/94640385515.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a267eabf65---xuluxavaxekodilogogul.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/fojoxejadaboxe.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/99699902146.pdfIn PDF document text
    • https://12shio4.com/contents/files/64814424084.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/pedirisiragarixogonenudo.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/21539596141.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/rexumisufufawazibureb.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/41412112076.pdfIn PDF document text
    • http://brenderup.ro/mm/file/28339644914.pdfIn PDF document text
    • http://precisao.org/files/files/tidevijanizuronex.pdfIn PDF document text
    • https://akconta.com/uploads/files/wimabikemunedamopazo.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142291ee28df---gakegi.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_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 19680 bytes
SHA-256: fb65bee068915765091692237e527a40b35312dbcc5c10c674b954975d277c26
font_01_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 10208 bytes
SHA-256: 4d92593201a5e8e17c0336623e6cf8c360d855993286e713b772387f39cf4766
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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