Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fc81374ba00331…

MALICIOUS

PDF

91.0 KB Created: 2021-03-03 10:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 870199488b625f82310f2a1dbbe86eca SHA-1: f26ac412e2931b5b772c35ab86b374a17b585fc9 SHA-256: 25fc81374ba0033125c3c13f2db10aeb41aebab0974268e8619116119e31f138
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URI suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://gimoguvi.ru/award?keyword=6+of+crows+characters PDF link annotation
    • http://penaleduduzib.iblogger.org/81245626947.pdfIn PDF document text
    • http://varuzajuv.22web.org/delta_airlines_advanced_passenger_information.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/6jciijb/pokemon_go_plus_emulator_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_600025d9c72da.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/igfJjdx/66320929941.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/foijG6d/sezupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikubub.onlinewebshop.net/how_much_is_fl_studio_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/mosufikotesizalagidivawib.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/52831220597.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/57901866304.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/imagine_math_answers_key.pdfIn PDF document text
    • http://niwudovokev.epizy.com/zakavuw.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/free_tax_expenses_spreadsheet.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_off00012bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBB 5088 bytes
SHA-256: 0173a40d9b1a0fed2d83976d0b0051c591b6f82f6da90c1683e16aa9dfe0c6c5
font_01_sfnt_off00013d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1B 10164 bytes
SHA-256: 39520a140fe525d028c13f832cfee09d7ff0d8c12093f79f29b15e5201d6cbb8

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