Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecfc4326436d003…

MALICIOUS

PDF

69.4 KB Created: 2020-11-29 19:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dce3c86bd25f9ea64d112b43fec44a0b SHA-1: 9724931d2fd3dddceb5b595251fd94d43f758437 SHA-256: 7ecfc4326436d003bcb47a9426b5860cc3760ad846070ec553abe33681814479
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=a+mother%2527s+prayer+for+her+daughter%2527s+wedding In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_5fc370cc32dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fb9e45a7ecbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f9dd01239e07.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/6d4f1683-0748-4fda-a3bb-9d3c3837f684/esl_certification_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95565c95-4ace-4379-8ca1-287a9cc72ea5/99070330031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a041bd1-899e-4876-96a0-e16a97702358/11003826424.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/intermolecular_forces_worksheet_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b004706-8b93-4b4e-8496-194f5394f402/22315035500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389e048a-3e22-4865-a40c-818ced0c1042/kazarusesepewedorox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657b50d5-537b-4799-a6a6-1b4837bf3bd8/10700129335.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/essential_cell_biology_test_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3b61e7-cf3d-43d5-96d6-dcc9aae95dd3/daduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0986b2bf-044b-4ec0-b970-c82585eb8d77/swtor_jedi_sentinel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfe40a0-e982-4fd0-a356-263d121cffc2/anomaly_2_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1de559-a0de-4308-9844-eec43452dc09/final_fantasy_brave_exvius_jp_apk_download.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_off0000d345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD345 5640 bytes
SHA-256: 6faae5772f50322ad206f7e9e790d64f22b61c792e047fc1af83c98c9c163a17
font_01_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 9924 bytes
SHA-256: e1809b780bc3754c596a773675e43faf12a5a0384557594c7784d6ecd9361cac