Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff62711a212e69ee…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 07:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cd80f7891fa640107a6ede6da95ba697 SHA-1: b772c8243ce6cfc405ef40e5efad3f68b60721cb SHA-256: ff62711a212e69eea203d00b84ccd5bd7dacb90d71566a646f6c7c14faec16eb
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document that uses social engineering tactics, specifically a fake Dell support BIOS update lure, to trick users into executing commands. The 'SE_CLICKFIX' heuristic indicates the document instructs users to run commands, likely to download and execute a second-stage payload. The presence of multiple external URLs suggests a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://jacksth.ru/123?utm_term=dell+support++bios PDF link annotation
    • https://sojuseruk.weebly.com/uploads/1/3/4/3/134367588/0a4272791.pdfIn PDF document text
    • https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/nojujer.pdfIn PDF document text
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/9021ce7ca.pdfIn PDF document text
    • http://esportzmlevent.com/31613492354c0kok.pdfIn PDF document text
    • http://rabota-plus.club/wizard101_death_spell_guideegknq.pdfIn PDF document text
    • http://saudiautoinsurance.com/mapex_mydentitycu0a9.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/folexigifsnsfa.pdfIn PDF document text
    • https://zefugomifavo.weebly.com/uploads/1/3/6/0/136087281/rotutetipejitoj.pdfIn PDF document text
    • http://indital.space/65199825360w7lwn.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/12040756654.pdfIn PDF document text
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/jogiwix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/conversational_english_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/tasadukosisosin.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/47998496164.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/48976647078.pdfIn PDF document text
    • http://pejemevogoge.myartsonline.com/obituary_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/2086575427.pdfIn PDF document text
    • http://nitubak.atwebpages.com/medscape_physician_compensation_report_2020.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 4740 bytes
SHA-256: 63e8b75689b87e4a9418f7115c491fcdbde13a3098cb01bc3f310889c9833896
font_01_sfnt_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 21140 bytes
SHA-256: 8e51026b3dfa4952087da7296b6e540dc8e8dcb4654b72210d47432688843baa

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