Malicious PDF — malware analysis report

Static analysis result for SHA-256 89aff59ba1f9c995…

MALICIOUS

PDF

68.8 KB Created: 2020-11-12 15:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 77183b6460dee11e879276d45891ad91 SHA-1: 98ca26e5e07b1287eb48ae20492f2067450afb50 SHA-256: 89aff59ba1f9c99502770931352a7b118a3c692b0338a73bcbdbf3c343df2c55
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to a malicious site, likely for credential harvesting or 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://traffnew.ru/strik?utm_term=ejercicios+de+verbos+irregulares PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f90dd6ec8cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5faade686dbb7.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/xamibudasagas/39801281528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f50570-db67-4f7b-b2a3-0ddd64e5905a/the_game_of_nasty_things_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea39c3d5-0b36-4b88-9257-633af1d1b601/wedibuxozodadopev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4059ba-f3c4-4b4b-873a-4f4c28113de1/24125073721.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/muvamoripi.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/synonyms_for_nostalgic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5ada74-034f-4dde-a0c3-391a6b78da5a/23802973610.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/aviary_editor_de_fotos_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/laporan_apbn_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4fa50e-4daf-467d-ad66-8c06bb438ad2/mepetoparetik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826b3151-70b6-485f-a1d4-1f6f2b89eee4/24619008966.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/lizardfolk_5e_character_race.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c23959e-438f-485d-9ce8-157297632108/formula_hollywood.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 5340 bytes
SHA-256: 237365fe8f92420db6ec28b7e1c485c354b2a480b82b8b63e5c2624dd6dec217
font_01_sfnt_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 2464 bytes
SHA-256: f82f0b813fe3a6ec7573029c57516c09449e21c867c1d9eaf355919b40cfffad
font_02_sfnt_off0000ddcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 11740 bytes
SHA-256: c93c5dd2cf8721721f1bcb45b20b90f7e403477749db997112a564f040ca2da4

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