Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d28efdeba1c702e…

MALICIOUS

PDF

83.3 KB Created: 2020-12-25 02:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 97e9f0e618bae3ca6c64f019638ec1a3 SHA-1: adaf0bfa0ea499a88979c89eb1925d81ed6057cc SHA-256: 5d28efdeba1c702e9a4a2c03bd757fecd7ac260d5a77fab2713c72b3e1b47450
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The PDF structure itself does not contain executable scripts, but the presence of the external URI is the primary indicator of malicious intent.

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://trafficel.ru/123?utm_term=sushi+catapult+unblocked+games+66 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5fc433072970d.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/5157b1de-9302-43e5-888a-034685742755/jotipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0417c337-411e-4225-8c0d-eb85c015975e/all_the_vedas.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/bowers_wilkins_p7_wireless_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c517ccb5-82b9-4385-a0c4-ad5653f3cc4e/10997570235.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/breckinridge_county_school_district.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0238846-e6a8-4d33-b23c-326a4b0e20dc/obi_wan_kenobi_memes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e471cf7c-f0fc-4c1b-b4de-a8f02cabfaeb/alvarez_rd8_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61d4b9e-5abf-406f-b242-2fc152f09e7b/95441517625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c99f07-b1e2-46e2-80d2-0cf8163b7742/american_government_chapter_2_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/august_2018_a4_calendar_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7419ade-4a79-4254-a5c0-c9874443dc65/tigaxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8c7fc0-5e4b-4513-a801-392cf71b9b72/15747610618.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_off0001093d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 5852 bytes
SHA-256: b9cf40142439e862c45891eaf9039e3c39fa5a9460cec5dc21f4091d25425391
font_01_sfnt_off00011cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 10488 bytes
SHA-256: 7f143e7bff542c3560c2c1c02100c5c3d229247c99926c1a6b07041dd6a4bd2f

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