Malicious PDF — malware analysis report

Static analysis result for SHA-256 5775f09b9c2f8a0c…

MALICIOUS

PDF

58.5 KB Created: 2020-11-29 03:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2edd7bb82e94e30be0eefb7566ce4f2d SHA-1: 5d49f8c4ce16313f7f8deb88ebef851c149c8a58 SHA-256: 5775f09b9c2f8a0c094514e10d4d854700a6d9334f67df33f5f840040fec2160
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 0.9996

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://cctraff.ru/123?utm_term=1903a3+scope+mount In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/11_22_63_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/houghton_mifflin_harcourt_performance_assessment_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/mixemam.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/the_very_organized_thief_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98cd0586-bd12-4a19-9170-34c73666c1d8/canon_sx500_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa819979-f2b5-497b-bc70-7a2d8ef6979b/teoria_y_diseo_curricular_martha_casarini.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/xibemedigowaxosumorareja.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/bozewamodiwek.pdfIn PDF document text
    • https://s3.amazonaws.com/liwelu/zorufawom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a777897f-729f-4cbb-b296-7ddde6b18f0f/kazivame.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/2193118032.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_off0000a875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA875 5372 bytes
SHA-256: 735ba0d08d387a85dfd9a4ddfa52930c0a9cc753495765b841f80bd7b9eaf076
font_01_sfnt_off0000baac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAC 10376 bytes
SHA-256: f387eaaed8610c3a6c47ccc90e10196f458cdb8de80b00730cc4d4d458b2abc2