Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef5b70eb8ad4218…

MALICIOUS

PDF

73.7 KB Created: 2021-02-25 08:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a661ea8f6f57240e74313f5030d6abbc SHA-1: 63ae61305cbf2bdbc8c932509bd538722da422eb SHA-256: 6ef5b70eb8ad421811ffbfef83bc4c4226c804eb7aed42e1b96e6d80f7e545c2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that, when visited, likely leads to further malicious content or a phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Plato's Republic summary YouTube'. No scripts were extracted, but the presence of external URIs points to a download or redirection mechanism.

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://seumenha.ru/award?keyword=plato%2527s+republic+summary+youtube PDF link annotation
    • http://mobeditobaxul.scienceontheweb.net/powusokelelo.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/66812305229.pdfIn PDF document text
    • http://demegudatodura.iblogger.org/calligraphy_handwriting_template.pdfIn PDF document text
    • http://jikusoxet.iblogger.org/wogulokasotiruto.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/quotes_from_ram_dass_be_here_now.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/how_much_oil_does_a_craftsman_power_washer_take.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/ehj9hjU/easy_chocolate_cheesecake_recipes_no_bake.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/ninazarila/57128700980.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/laboratory_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/birds_and_the_bees_pop_up_book.pdfIn PDF document text
    • http://nisijavifusepov.epizy.com/52137460857.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/lisinejepotaxezo.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_off0000e50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50B 5356 bytes
SHA-256: 2ee27d1ff14fab722a356f9f3763317a92ad9376f441703a46f03bd346b62109
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 10208 bytes
SHA-256: 5013b0da694a1912191ddd29d8ea9c47ec1a27ba99193f2c61620a082d0f779d