Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7433b94c2e9a7d2…

MALICIOUS

PDF

68.9 KB Created: 2020-11-19 19:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d988b40a1650793469ab8bc0d29cfe33 SHA-1: 73146d6ce82045314df78753ce5c55911c38bde1 SHA-256: e7433b94c2e9a7d25489a46bc42d1ff7bebfc5561f5aed322ef4b11ef80f6490
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An embedded URI points to a suspicious domain, suggesting it's used to host malicious content or redirect users. The document body, though partially garbled, contains text that mimics a book chapter, serving as a lure.

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://trafficel.ru/strik?utm_term=the+enjoyment+of+theatre+9th+edition+chapter+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475212/normal_5fa8c14022fff.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/dutuzanob/five_guys_application.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/xavewagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec70cad0-72a3-4bcc-a931-978ef9a777b5/accurate_reloading_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/vuzemojup.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/mekosoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef74ee33-89b2-49a4-b11c-8f1db8b24d5d/gizmo_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9ab813-84b2-430d-9aee-934e317c0a92/21011732933.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/29590127541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad79848-7628-4dac-b3c6-8c67bae9c721/green_springs_elementary_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa3b805-66da-4a4e-9bbb-72e2809afbda/faradowumowasodeguradu.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/2013_mustang_floor_mats_with_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/derefe/78664248326.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_off0000cf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF66 5520 bytes
SHA-256: 793297c52809ab602eb1e4e025e99c82c4bd9923754eebd72e2c8ab506c0773c
font_01_sfnt_off0000e216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE216 10960 bytes
SHA-256: 525cfe0ed98c53c4e150ed1d3d6534c54389f01c9d557111a288ab6e334bf845