Malicious PDF — malware analysis report

Static analysis result for SHA-256 26dccb54cd73c4b7…

MALICIOUS

PDF

34.4 KB Created: 2020-11-03 03:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3604071cd5db5c0edf0a3b7c67f52747 SHA-1: 93b884cb944a32cd3a889ba15b26f3026f8e0be2 SHA-256: 26dccb54cd73c4b773b5a5e54745623369f2e68824392ae8e0f11cd7b83beb12
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 1.0000

Heuristics 3

  • 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://gettraff.ru/aws?keyword=combining+sentences+worksheets+3rd+grade In PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/bofewuseliwupogeb.pdfIn PDF document text
    • https://woruvewuz.weebly.com/uploads/1/3/4/4/134400058/0b1961df.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/nugedub.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/sokiranenixagomine.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/rekin_vesawevegona.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/kidugodofunose/robious_elementary_school_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c652e4-e63b-4261-977c-f70a32784f81/nadonasizebiburigato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f70418-8907-4afc-a52e-0489383accbf/tp_link_av500_nano_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff61ae0-844e-4ac0-82ed-d0c2b59c4cee/87793571171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ade56a9-0195-4f03-a131-01048d39a2cd/wujotepuzumozuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d5df40-e3be-401f-b1e3-24447d28274e/13594852492.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/fezoralurexexijitogamedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d032cd6a-8340-413d-9f3d-6fe8d9d360a3/reguvududixozoluriset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1ba0a5-b694-4432-b92a-171f2c9e7a18/fomejanumopir.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_off00004728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4728 5684 bytes
SHA-256: 7b4dd0234aa628cb439cce561023f7831523ae79a09c677d8a182c1f8d932137
font_01_sfnt_off00005a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A67 10020 bytes
SHA-256: 0ce49f3b63e8489c17608034280cd32dbbb66754ab66bb725772a6b58743e8b0