Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ab91e30361c92f…

MALICIOUS

PDF

69.3 KB Created: 2020-12-07 13:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 16126de74fdf3ac4167188799324570f SHA-1: 257ba60a6da6ba79312e73597a4d8383dfb340bd SHA-256: d8ab91e30361c92f65e71280c308322ff0c600f03f08379f3d107e68fd2d49d7
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://traffnew.ru/123?utm_term=extra+class+license+study+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8750c3a373a.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/6f88c892-5f3a-4ebe-9198-03e2a4bd028c/philips_sonicare_e_series_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b54584e-a241-40df-bda6-ce005596bb71/22750094493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b5ee04-3a53-4a0c-a60c-8d1ee0465340/shell_flow_meter_engineering_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/41614072096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/030c46d4-1b3a-4018-acc3-35c98330a70a/23262537187.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/cartoon_wallpaper_for_mobile_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/bajofemadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7915a37b-34e2-4157-9568-a3b373065966/articles_of_confederation_and_constitution_comparison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77790411-30e9-46f9-96c1-c3fa892e7b16/nurobadolavekuji.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/fishing_boat_designs_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed50734-2467-48b9-acae-2107a3d366ec/complete_decongestive_therapy_near_me.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_off0000d077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD077 5448 bytes
SHA-256: 5af3303c2470c6106a1da5ec0dfb9544c63f6ff44e5654456acf0627aea091a1
font_01_sfnt_off0000e321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 11044 bytes
SHA-256: 772df6265b536cdc0a324ba6a2b5120411e7680a6d1e32517e2260becd828550