Malicious PDF — malware analysis report

Static analysis result for SHA-256 5217fb37933460ab…

MALICIOUS

PDF

71.9 KB Created: 2020-11-09 23:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 17bc71b9229fec736abb19bb1154b95d SHA-1: de0957e3f7b7242d861fb24fd2715125f398f5cb SHA-256: 5217fb37933460ab09c612a966999a43911240280b746e74a99d5364d8f35caf
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 0.9997

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
  • 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/strik?keyword=old+school+new+body+pdf+free In 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/5fdf979a-8ea8-415f-b3c6-debc22ecb7e6/samsung_ml-2525w_wifi_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d041c6b-edde-4428-a630-354eecebc38a/jasetaleburuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/reading_the_forested_landscape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b100964a-362b-4a31-bf37-2f0c7a3bb2c7/luzojidetunaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cff738-0056-442a-a5cb-bdcc5c8e8b0c/boled.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/mezulinapojeduralujaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162da31a-80de-4e64-8c8f-c07271fdd373/fokizonezirepazipunoxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d6d029-1bb5-40dc-bf7f-310061ee36b0/zisalasekaponutekivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ddc3c1c-48b0-42b6-83a9-9081d98c7157/borokisubulosofegonuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c619f817-f979-4861-8aae-9a461f0f1818/62209235086.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/create_a_space_matrix_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/92498070849.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_off0000db30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB30 5392 bytes
SHA-256: fe0a03a9928a141f15760ae8956fa7d798fc76c56f7d2feaf17dd8b5fd1cea9f
font_01_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 10856 bytes
SHA-256: aec25edd5d36fb5b3813aab2734e090f0efbf3cb3464f1f2406ba5abbbf726d1