Malicious PDF — malware analysis report

Static analysis result for SHA-256 575328fb49b2260c…

MALICIOUS

PDF

71.5 KB Created: 2021-02-22 21:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 052657303692030de6f1b60d336baf38 SHA-1: 66ec64d8a7ce69f53714b3e796dbd0097614d3ad SHA-256: 575328fb49b2260cf2e5361fd78a975fcc07768a02260d4125fbddb8b5850f5b
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://seumenha.ru/wix?keyword=maya+angelou+names+worksheet', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'Maya Angelou names worksheet', indicating a lure. The presence of multiple unknown and potentially malicious URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=maya+angelou+names+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447431/normal_5fc75764692ff.pdfIn PDF document text
    • http://tekabufoj.22web.org/weximojipetokidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424040/normal_5fffcc1d290fe.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/94904923233.pdfIn PDF document text
    • http://surogufepisim.iblogger.org/6667860084.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/bidemewufa/93272583300.pdfIn PDF document text
    • http://gipizaz.rf.gd/term_2_quiz_2_edhesive_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/58445976805.pdfIn PDF document text
    • http://tijiwef.epizy.com/wuvovasewaripusatodu.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/97807534988.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_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 5364 bytes
SHA-256: 6f50bb99a9d70df0d90af8daa8c735a0c5b30c7eaf6f2f902a3233111c6ab223
font_01_sfnt_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 10408 bytes
SHA-256: bbf9fa5bab1fe1021ea6d3bc99e7a1773ef329496c919c9955da23778dee1125

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