Malicious PDF — malware analysis report

Static analysis result for SHA-256 107a17c56c6d27c1…

MALICIOUS

PDF

72.2 KB Created: 2020-12-05 04:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5b11b6cbebd9bc04b561b9dd9e9645cf SHA-1: 88cabffec3047e0485becb6f2f1e2f0c3321c65d SHA-256: 107a17c56c6d27c1c712c99ea9010eb325f00b1a9274147b32446bebeeadcb2a
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-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/123?utm_term=code+silver+drill+hospital PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5fad2fabcc3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407818/normal_5fbb5a7545c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8c47feee8f1.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/medaliwifufugel/modern_automobile_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/opioid_epidemic_public_health_crisis.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/brenda_fassie_thola_amadlozi_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/rental_agreement_template_word_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/formal_letter_format_english_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d98b79-3c02-41e2-a27b-b53f816dbfdd/packing_foam_sheets_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b49ce9-6a6e-48a7-86e7-17fc6aa63162/livro_de_economia_para_concursos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1b36d4-ff0c-43ca-88c4-c93e3aeb4c54/bijedi.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_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 5012 bytes
SHA-256: 4d9c86826741390281dc73da0903468d4d539511f75ee891298b75bb53ecff98
font_01_sfnt_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10688 bytes
SHA-256: 7bbcba1341ec695f985530ff9f2e56b62148e5202291b8b79675fb2c295d31ca