Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed83f76340dc275…

MALICIOUS

PDF

78.2 KB Created: 2021-05-20 12:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 74f5ed01f36dd2855bdf5d40cee6b05e SHA-1: d3e2531af91df3cbb3e56660d4a3e1f879bfe20e SHA-256: bed83f76340dc2758c1c7d6119974f9d5adb23c91b1706e5a53c3f8add2a7b42
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'botokaw.ru' was extracted, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, but no clear textual content that would explain the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/strik?utm_term=how+i+spent+my+summer+vacation+paragraph+for+class+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485010/normal_6036e17fc0d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_600bd40929349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_601d010d2f602.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/mukut/apache_tomcat_8_filehippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127dd15f-543a-4e40-aab4-2d1c7e629e8e/1._which_one_of_the_five_is_least_like_the_other_four.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/assassins_creed_script.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/sinagixodijuwuxoloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8979c3db-9870-4ac4-adda-b33f629d4fea/magudibinutokonatave.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/6796435082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992efe71-47bd-4cf8-988f-25d74b9e384b/46892714237.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/fha_va_amendatory_clause_and_certification_form.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/dalupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129ad9f6-a000-43b1-89fa-9e6b6d8b7208/which_statement_is_an_example_of_discontinuous_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e02dde-d728-4581-93f1-6997a3e9ba77/how_to_reset_emerson_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/townley_grammar_school_sixth_form_open_evening.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/juziw.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/madame_butterfly_opera_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009e2d5f-1c43-4f3d-8a3b-231869da23e5/data_warehouse_consulting_companies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753fc778-5246-4d63-97c8-7e222878bd06/zekuwulofevimotex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bbe3e1-a1df-408c-8cb1-0ead0bd44aba/how_to_check_voicemail_on_a_cordless_phone.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_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 5836 bytes
SHA-256: 836c12f4a761e60df7097104a40c7566c69e209fd7abaed637be62d83e064aa4
font_01_sfnt_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 10736 bytes
SHA-256: aa72e5116c7e0ec6518a1a35d55a80894ee01e3d6bad3a7aac232496a21734c2

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