Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb8a67cc36a82ac…

MALICIOUS

PDF

73.3 KB Created: 2020-12-22 07:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 36d6f88897c770ccab7efab4c0dcc800 SHA-1: 7ab7b6edc0bf6351dfe1f46d42581bd12229135e SHA-256: ebb8a67cc36a82acfea0c02cd22a25355c4841fc7de2fbb3bfede6639442593c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=alien+swarm+reactive+drop+wikipedia PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e19dbda9c57a97be1de8/t/5fc840066031f4738618e659/1606959112363/zovodevemesodegilakul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2cb63bf71053ccb1c5e2b/t/5fc62c82145a8629dc840570/1606823049801/screen_recorder_capture_audio_recorder_app.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/zuronitilalebafirozef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf4c2ab-74bd-40eb-bce8-cd10449f4f03/57259530403.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174e7bf71053ccb141a2b/t/5fcac91deaa0f22c909a18a8/1607125278069/good_podcast_stories_to_listen_to.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1138816f6d44b07bfcb5c/t/5fc308b63c02f22b9d711837/1606617271962/fexatanarase.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/vofasovasi.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/6198183410.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc785958c9e503d27aa33a1/t/5fce91119128622ed7fff241/1607373074673/kepuxijivelogumijekepokok.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/wimabodivokuvelumiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ac1588c99b6d37c7e4a8/t/5fcd63ef5d2e6f3bda4fa95c/1607295983347/dominos_delivery_hours_saturday.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1ec0173fb5383b6acacc/1606295233052/human_anatomy_directional_terms_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfcde490302e2a48c51263/t/5fe0a7046a6ad7222f4d027e/1608558341296/42102619887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e856d6d-c41b-4182-acf6-9bd080fcd685/80808749301.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/62925832961.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc6d4bb3ac9c763f4c4a010/1606866108647/events_happening_in_st_louis_tomorrow.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_off0000e05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 5424 bytes
SHA-256: 7a48110601b4c0fe951331758bdc2cf26e2bfac4914bdfc383a7c3447824e178
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 11212 bytes
SHA-256: e160a3bf0d012fcb8dde9d3325d9f0d2556273867ff0af1ff23e3617fb5c17fb

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