Malicious PDF — malware analysis report

Static analysis result for SHA-256 0533b2ba421d3115…

MALICIOUS

PDF

63.9 KB Created: 2021-02-21 02:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 30f7e732d05137c317d0f03502200ed3 SHA-1: b10fb88f5742e79d0635a577658dedb8bf5b50f5 SHA-256: 0533b2ba421d31156d023608bce6387491cef2630ed8998f57aae0c3ce9f893b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of URLs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=air+mass+worksheet+ks3 PDF link annotation
    • https://cdn.sqhk.co/gitovera/jgazlLI/used_soap_cutter_for_sale.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/84471d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fc9e58c468fa.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/eehfAia/brimstone_haunted_hayride_video.pdfIn PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/6e24712da8027ab.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/lxZqWgc/zonabipozibudut.pdfIn PDF document text
    • https://wetarotener.weebly.com/uploads/1/3/0/8/130813606/putotanomoziru_difidul_sapevuxudeva_datatiwodube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496372/normal_5fd9f384de0f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403672/normal_5ff01eecbe70b.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/fixararololu/5th_grade_math_elapsed_time_worksheets.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_off0000bb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB54 5204 bytes
SHA-256: cf5bb190d62a1a94520ce14067ce4cf841c59586132ed8654360a1f6ce9f5fc2
font_01_sfnt_off0000cceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEB 10860 bytes
SHA-256: 8a519a00a5cf3d51ea7512363268b208af37777cfbdbeb35990cc5ae427c23c0

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