Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddf240994880606…

MALICIOUS

PDF

83.6 KB Created: 2021-05-17 05:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3b5649c1eed7a4ed606cb77d6f5cf2f SHA-1: 82fe29f23306ae846af458b886283b615b605cae SHA-256: 4ddf240994880606995319956279492f50d3302a3c9272bae2968318b0978fff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a 'Medical spanish course abroad', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://jumiwimov.ru/strik?utm_term=medical+spanish+course+abroad
    • http://virona.org/182037134957cbry.pdf
    • http://werenntaq.online/how_to_install_hp_officejet_6500_wirelessc8n58.pdf
    • https://cdn-cms.f-static.net/uploads/4373998/normal_604d96b1b24a1.pdf
    • http://antonioit.fun/foxit_reader_printer_setup6nra0.pdf
    • http://finovadi.iblogger.org/6732156252.pdf
    • https://cdn-cms.f-static.net/uploads/4412894/normal_605ac1dca8b20.pdf
    • http://zaxunux.iblogger.org/cpctc_worksheet.pdf
    • http://show-visitor.xyz/what_does_marginalized_population_meanrvz2y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_836caae9a8404e1a95bc1be726a9e313.pdf?index=true
    • https://s3.amazonaws.com/zarelusipofox/64153138111.pdf
    • https://s3.amazonaws.com/nawuvud/bovuzixatonan.pdf
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_1765e5adb7c746deb0258dfd7c7315f0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3714d96f-46cc-4d49-9e35-0e00cfc543ea/what_are_some_vocal_warm_ups.pdf
    • https://s3.amazonaws.com/jenagubadopi/duputa.pdf
    • http://konemuga.epizy.com/21112124891.pdf
    • https://uploads.strikinglycdn.com/files/12a5e300-05ea-48ad-b39a-6e5f867abd1b/towobukadiput.pdf
    • https://s3.amazonaws.com/tumasun/bezutevexaxomozowu.pdf
    • https://uploads.strikinglycdn.com/files/e7555b68-1c48-4443-b07a-647f94da494f/5721044606.pdf
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_90de73bc2cdb4c589b503040fc8e4112.pdf?index=true
    • http://zelibigevuloxuj.epizy.com/9297366521.pdf
    • http://wexavow.epizy.com/taviluwafom.pdf
    • https://s3.amazonaws.com/gonasidupij/79525987811.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb4.bin
d86c2d7343cf5842db0e8a7370bac879d918b69bf0ec12f9a722927c4c576149		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 5108 bytes
font_01_sfnt_off00010de7.bin
086f985746cece33f09e5ee8f814a1e048a971101db3da575ee9bcf60ef5d310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 11008 bytes
font_02_sfnt_off00013331.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 4324 bytes

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