Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc9a12b96c43adf…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 16:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 189c598aceb34120b5872b7b6aa54d9a SHA-1: 6a2e92186b7e882c21547cca18e5e87f8ce8faef SHA-256: 5dc9a12b96c43adf1e1f0815739393d07a4b9efe349b56e63372bd9670da1a0a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=nervous+system+review+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/luxanimev/iEiiBid/xifafaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5ff839495dd4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5fe117a470d73.pdfIn PDF document text
    • http://gonzo-3d.com/thorax_anatomy_humano0vyr.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/Ijhhhje/11655937405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459176/normal_5ff36d1e952be.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/7Dv8jjq/league_of_legends_wild_rift_champions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/vujuvibipinevi.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/ravurogigefipojuf.pdfIn PDF document text
    • http://mudotepejix.epizy.com/firth_of_thames_fishing_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/mezibifasut.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/xepugugugexaped.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/52999569751.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/sendgrid_email_marketing_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/harrison_bergeron_questions_and_answers.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_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 5180 bytes
SHA-256: 8fbf782b39de84d430259c2bb51b43b9238d1035b95bc5381bb9ee30e28bcc12
font_01_sfnt_off0000f54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 9688 bytes
SHA-256: b9cf73ab25dad9469953d1b1f1ae9278026b64bf9e9c2f6cfd06cb370aa461dd

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