Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dc349db797242f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-11 09:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 48c8180764ce33c6ba20c001634af55b SHA-1: b0f82ba92a696318a48700e9fe5dd432b18e1349 SHA-256: 04dc349db797242f4ae48067feac948de19a4b8334f4a10553840b7eb1977a95
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, suggesting it's used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=5.+1+congruence+and+triangles+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389585/normal_60066b211b967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_601aefb42dee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_60152d3e4bf63.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/jbIjgVD/97963468809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_601bac77200b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_601b26ecd0fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_60443fc818715.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fdd36f019958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_5fda921e6a90f.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/jhfAjeF/the_sims_4_cheats_ps4_get_famous.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_5feed3dd0fc95.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/gurupixabogivaz/63622682994.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/46584574718.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/vejusadaleviw.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/school_objects_vocabulary_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/3462105534.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_off0000fe4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4F 5472 bytes
SHA-256: 923c8a0c98a7ab20ca9070483af11dcc8c7ff2d228cde13ce9f0c49d5e44e288
font_01_sfnt_off00011103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11103 12488 bytes
SHA-256: d084693a026d8f877e859cc7e7bc75f5a5e290c970ae8deced9dc7752e6c4ee0

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