Malicious PDF — malware analysis report

Static analysis result for SHA-256 569aa36dd7fee205…

MALICIOUS

PDF

77.1 KB Created: 2021-02-21 10:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 22a8f5b9078450b70cacfd365b1f1dbc SHA-1: 39b2d7eb5f564975bd93c80a5b57aba1e5054b6c SHA-256: 569aa36dd7fee2055ce93ef9af206f8dd16c66c75b5f672b84cf6f6b4a180811
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=as%25C3%25AD+se+dice', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=as%25C3%25AD+se+dice PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370263/normal_6012dd6e277de.pdfIn PDF document text
    • http://lofitner.buzz/telamimuvefuwijozumenarbnyby.pdfIn PDF document text
    • http://yeswins.space/82189298956uj39p.pdfIn PDF document text
    • http://bloomwithdeanna.com/change_background_color_android_studio_codeya569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_60137184bd8cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427094/normal_601077ba86f03.pdfIn PDF document text
    • http://crystal-light33.ru/gudefodapesagunimuzizoctoin.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/nevovumowa/oxford_modern_english_class_6_teaching_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/how_to_move_guides_in_illustrator_cs6.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/cuneiform_writing_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/74096722533.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/87138016998.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/63341881898.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/18170296174.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/tulozopidamu.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/96900043061.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/23503270142.pdfIn PDF document text
    • http://ronogaso.rf.gd/browser_history_android_tablet.pdfIn PDF document text
    • http://tidisel.epizy.com/41303344820.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/flexible_glass_mirror_sheet.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_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 4640 bytes
SHA-256: 73f8065419efa57a06fce5ddfc91967f420894bd9e32792f11bae2d4faf53f03
font_01_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 12436 bytes
SHA-256: f6c1fbdeb7f173c626b3e8a2aabd21810fcbea4f62ebf91bfe9d4b223bf5c81a

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