Malicious PDF — malware analysis report

Static analysis result for SHA-256 d430cffdfd4e0f33…

MALICIOUS

PDF

70.3 KB Created: 2021-01-04 04:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e990600da36fc2de1c4d97026067b692 SHA-1: e7a85f3d0aefbe95666bac40bf85464f3a7a7001 SHA-256: d430cffdfd4e0f331ea07ac4c567929adafdaedf35ceec733552d35ea9638ba5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to reference the URL's theme of 'Ethical issues in psychological testing and assessment', suggesting a phishing or social engineering lure. No scripts were extracted, but the presence of an external URI and the high confidence threat detection indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=ethical+issues+in+psychological+testing+and+assessment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5fb8460b47cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5f97a4eb7f800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fd26cb61dccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f87e8b7248cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_5faee603bdf6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_5fa237eb75d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5f9587b642164.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/mamukawaxatali/11817856282.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/guide_to_foraging_mushrooms_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/logo_quiz_world_answers_level_11.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/dufuvowefen.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/messenger_app_for_windows_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bba3e7e-191d-4cf6-bc92-de141fcd0ac6/restaurant_viking_iceland.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/12778583668.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/www._cgpolice._gov._in_2017-_18.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_off0000d61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61D 5452 bytes
SHA-256: 72bc6c13ef596af681c7dd54f8ff01f2a0f04473236d1c68dd5530369d89b2fe
font_01_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 10424 bytes
SHA-256: 4c720012b4960039263821f75abff292b20629639b321d3e8598ff943b3600db

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