Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf24249b39591652…

MALICIOUS

PDF

66.3 KB Created: 2020-12-26 02:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9ba51dd9444821cd932db1201997017e SHA-1: fc5e74e2d1f651ef55bde997578b3383d72b86b4 SHA-256: cf24249b395916521c1718a0ac433ad76447b3eb0b87efc988b10021de6121b5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of an external URI and the high confidence scores suggest the document is designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/wb?keyword=resident%20evil%20resistance%20characters PDF link annotation
    • https://cdn.sqhk.co/sofaxuleruri/cghbgfe/blocksatz_mit_silbentrennung_word_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/gAiienV/apple_airpods_real_vs_fake_box.pdfIn PDF document text
    • https://cdn.sqhk.co/nibidawe/igiblOU/zenajorozufokob.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/BxykjdG/classic_online_games_2000s.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/wemupajese/39147354572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddad9987-d67d-4c07-82d8-5c1011b07625/wevugelaresobupuselutajis.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/lamegabejapemuboguxaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64298bf5-7ebe-439d-a7d8-6f5bf16e4bbb/wolf_of_wall_street_free_online_streaming_no_sign_up.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/53424360466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a051b455-a8a9-476c-b204-f9ab3654ce35/gary_and_mary_west_health_institute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28037634-2373-4f23-8c15-dcd2fcc3dc1d/dr_hildegard_staninger.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_off0000c641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC641 5096 bytes
SHA-256: db080b3c2bf0922687d43d018041eef7921d2c4a21b72c15a38d044d046557a0
font_01_sfnt_off0000d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 10868 bytes
SHA-256: d1201384b1b1a96586139e788ed6596a85970aa1f2d9af4b98648ebebacb96e7