Malicious PDF — malware analysis report

Static analysis result for SHA-256 d873d7108042af23…

MALICIOUS

PDF

63.0 KB Created: 2020-12-27 22:08:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bf84b78a1721009a7fc4de93644ca2ab SHA-1: a1e53d58b750504e886864cd00fc9dae005dce8b SHA-256: d873d7108042af23234a4cafa60e7188aad1d8f15f417ff90aab0721eca4b7e5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'https://trafftec.ru/123?utm_term=barnes+city+figure+8+track', which is likely part of a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to lead the user to a malicious site, potentially for credential harvesting or further malware delivery.

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://trafftec.ru/123?utm_term=barnes+city+figure+8+track PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f9e74df84972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_5fdb9fe03e270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446287/normal_5fa86aee49c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_5fb65e1f25d33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fb90e35533bf.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/wujapu/essential_mathematics_for_economic_analysis_3rd_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/during_cell_division_chromatin_condenses_to_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/ririxibevetil.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/family_budget_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/75135836668.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/sistem_pencernaan_makanan_pada_manusia.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/briefing_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/agenda_2019_gratis.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_off0000baa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA6 5424 bytes
SHA-256: 4abaf2c85da8e283dce79da0d761fb807de7336963d0ab5e30a59092482b958f
font_01_sfnt_off0000cd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD40 10104 bytes
SHA-256: 4843114b2699fc3687b3057ef28bac852ef1e00b89459e61e4409e39d66b1b35

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