Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76c655c8df00529…

MALICIOUS

PDF

114.5 KB Created: 2020-12-08 19:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1d98af2232e6791f13b310e8451b577a SHA-1: b91fb6ac3ec1e7a0f1235ac4165c2c518acbd8a8 SHA-256: a76c655c8df00529555387b91840a5c9523a8485a7bfc02b151685ac596854d7
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=tri+cities+high+school+logo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fc7466c72afe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458614/normal_5fca76e8b5a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fa908753c462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481509/normal_5fbbb734233ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5fa1bd9067cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450427/normal_5fa61118607d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f9d500274f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8b50c65fbfe.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/fulomufimikim/video_maker_software_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/zuvagak.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/22648303620.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/sulevogunilu.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/kalyug_betha_maar_kundali_song.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/canadian_citizenship_test_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/lomafefosemutimabodivu.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_off00018776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18776 4800 bytes
SHA-256: aa893a859856e2b88ba0119bd90e038fab6252896c5f720a734588e57fc7de2f
font_01_sfnt_off000197c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197C8 10832 bytes
SHA-256: fd5fb4ab805a6f40c0dcfaa90da51ae19bb7db51431abfd02ff56859a3513feb