Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2889c2355041c70…

MALICIOUS

PDF

78.3 KB Created: 2021-03-10 15:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8da53df71c184a7a063bbe9d2e92d514 SHA-1: edc3f9020074f66527e6092c96ad9a1c467a8e38 SHA-256: a2889c2355041c709f76a2f7755ff54c08bc64b3da3e801092d389d56521185c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as an educational resource, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of external URIs points towards a phishing or credential harvesting attempt.

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://botokaw.ru/wix?keyword=6th+grade+mountain+language+answer+sheet PDF link annotation
    • https://weluperexofabed.weebly.com/uploads/1/3/5/3/135382791/1507490.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/pepufevefukup.pdfIn PDF document text
    • http://chestlune.online/vipavumiwgvmq.pdfIn PDF document text
    • http://oneitstore.info/resumen_del_lazarillo_de_tormes_capitulo_1qu3u4.pdfIn PDF document text
    • http://stassikorskyi.com/gonuwegiloxit3dfn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd63d7f-1adb-40c6-97df-625f46a0cd8c/what_are_critical_interview_questions_for_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/redusoxafido.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/zupuselitodu.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/lobisidufikofuxatewuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cba6d41-4a5c-4315-9896-8781e2101203/57518369148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c0efdb-4895-4e23-b370-98b21afd06e9/wuledetijezukefukowusil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfa2d50-c7cf-4591-8cbe-3d1c711cdb92/how_to_turn_off_deep_freeze.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/vevezuxuvaxijagulewo.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/nimebolevuwawokar.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/anxiety_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a8992c-7d7c-465c-967b-9983316bff9f/73087844108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135d4968-e3ee-4f01-b992-42a52525aed2/niluniwejemajifepuxazato.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_off0000f597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 5388 bytes
SHA-256: e46fa7c996d72c915d5d5f06941cfa2d334358b723056b16928615a9939590da
font_01_sfnt_off000107cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CC 10580 bytes
SHA-256: 11769b60370b7c93ee9c1f265a1f36962b962d8797b00b56f73ab190878275af

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