Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4267b9ea8f21e0…

MALICIOUS

PDF

68.5 KB Created: 2020-12-22 08:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c22be2d4cbe65ffb8be48d022695cd73 SHA-1: 9cb21df14b64441f182455f06e67277906db7ca3 SHA-256: 5a4267b9ea8f21e0ccb70e7c180ee14c259bab3c914dff2cd39920aff4871523
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://traffset.ru/strik?utm_term=monument+valley+2+walkthrough+chapter+13 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fb30990a4f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fa89183e865a.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/1276b677-4b16-4dc3-922a-0113654d7a52/91867413234.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/burger_king_taco_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/font_assistant_bold.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/beep_song_in_masstamilan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fe3f43-8559-4b1f-9b13-1661db6a5285/limon_font_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503a7f6b-70a3-4895-94e3-8da625cf12c2/leserojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9eddc3b-44a5-4ada-ac29-6b119f32030b/ama_cpt_manual_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9916f2cc-6cbd-4b7d-8092-3d112dfb8e51/chicago_electric_welding_70_amp_arc_welder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426776f2-1cf3-42d3-a21a-0c66a1df7c7f/zoxokivowoputumiwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/48693717618.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/abnormal_pap_smear_guidelines.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_off0000cbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB8 5840 bytes
SHA-256: 6b10011fae5e959ba6a1e951050eb34a3203782231dc7d92aa43ceb0aaf2ff93
font_01_sfnt_off0000dfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 10968 bytes
SHA-256: 0944e4892db75fe7c41a94dd17f2db72784e9b1566009e5f209058f0b0a4433c