Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44ed067a0095e06…

MALICIOUS

PDF

68.3 KB Created: 2020-12-16 13:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6d9192b53f953da43efc920a75dc0b3a SHA-1: 319c170a165a187aa2bde9ae8a902589e883cff2 SHA-256: e44ed067a0095e06794b756c11ef9003b24642d3e825ce038324831ff9a81bf9
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URL pointing to a suspicious domain, which is likely used for phishing or to download further malicious content. The document body, though heavily obfuscated, contains keywords like 'Facebook' and 'apple mac', suggesting a social engineering lure.

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://trafffi.ru/aws?utm_term=facebook++apple+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5fc362fe3809d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_5f99d7b2bfdb2.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/9816344e-2449-4d20-a783-5528cf095532/ejercicios_de_vectores_fisica_1_bach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db691b15-7550-4d16-bd25-a52c71b5846d/22033238815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ea11c7-fc72-4c4c-b9a6-f2d53ff65e04/61736002147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d50eaba-041c-4801-9f85-3de8dd346a70/torodin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc555ab88c99b6d37c4c7cb/t/5fcf2c585c8977691e36e2ed/1607412825090/larape.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1cac4f07da69d6433d5f/1606229166392/elenita_cards_palm_water.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d2f2d26ff1194f734ddd/t/5fc0f5777acac6192ae3581b/1606481271545/the_brain_worksheet_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f50d6af-ab2c-4dc5-88ff-bcebcd1bf41c/hvs_school_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3070b4a3-f4c3-48da-8b4a-18089a08bc97/elements_of_art_texture_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf58e9f7cfc44f4aa845e4/t/5fd642fc96ed101a3e3bb6ff/1607877372025/35081703894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de782e6-75ac-4de4-9708-241e1241a568/format_surat_pindah_sekolah_mi.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_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 4964 bytes
SHA-256: 94ef4d0aa2150259930e4d112f34fe7e04306d58ecb46ab5e9f8d5c44c08d208
font_01_sfnt_off0000df69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF69 10796 bytes
SHA-256: 42fba935d82174c23af0be2ee52382ed9b248e0d7dbf50370de4319050fd8aeb

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