Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c81cd7a59a1a7a7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-19 05:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: afa1b4a838ba363ade26d3d2e217ade0 SHA-1: 1cc36361fa43cd754d344442f5f6cd7ddbcfc27f SHA-256: 4c81cd7a59a1a7a7479bba0190395fe22234db343bb7eb54e4b7b9a3cbb6ec95
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'seumenha.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=solving+cube+root+equations+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484097/normal_602c1317ae0e2.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/GUjhigj/video_downloader_twitter_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5fee12d5303f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_6025c3b34c623.pdfIn PDF document text
    • http://julubavixukab.66ghz.com/creature_in_the_well_archives_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/dSX1tjh/weserapezuzukediwiduba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5fde11c3e5d4f.pdfIn PDF document text
    • http://digitalmicroteter.xyz/23282568107z3fa5.pdfIn PDF document text
    • http://mavedelusudefiv.22web.org/47420937467.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413703/normal_5fcd18c61b921.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/inlet_outlet_surf_reportaydmk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_6008eaadd6c86.pdfIn PDF document text
    • http://mandarins.space/3585239332530vwl.pdfIn PDF document text
    • http://cyberlife.store/vuravivukigowajivuzajopipbibsn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5fc65e3c0a500.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pobiludorigogok.epizy.com/why_were_salons_important_to_the_enlightenment.pdfIn PDF document text
    • http://gegavolaful.epizy.com/interview_definition.pdfIn PDF document text
    • http://vedaremix.epizy.com/pizefirovaweririluw.pdfIn PDF document text
    • http://ratudafoxivux.rf.gd/algebraic_expressions_identities_class_8_worksheets.pdfIn PDF document text
    • http://zuwapiw.rf.gd/escape_room_2_level_35_answer.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_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 6000 bytes
SHA-256: 8f82b40bd615f60e7ffbd393b6c44155711fa18e9750b194ffe95f3f050c543f
font_01_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 10412 bytes
SHA-256: 496ac0b3a5b6910ef392e411ceb9c6ef187d0e6570432adf697c682f895bc2c4

Open this report in the interactive analyzer, or submit your own file for analysis.