Malicious PDF — malware analysis report

Static analysis result for SHA-256 85589e10b2093668…

MALICIOUS

PDF

73.5 KB Created: 2020-11-20 20:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 032fc50d583bc4649964fb0ed7d0b4ba SHA-1: 1f5eb3f68d40f8ce7216fec506a1e4be63af15e1 SHA-256: 85589e10b2093668d0fedd5a057fb11201ccf10e043daf13f4d131b1adacab5a
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 0.9998

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=google.com+thermostat+for+a+96+tahoe In PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/fufip_tibibavogik_lipafe_jijituzasar.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/0dabb76.pdfIn PDF document text
    • https://lidenezat.weebly.com/uploads/1/3/4/3/134382714/2902215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5fa6fc78cbebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f905c2d7caba.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/bc5f63f5eaad0.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/tuletivotarupu/panazedelezimofep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2d7caf-c50f-4e38-bee4-abc6225a5ca2/35803993498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01b475d-a466-4e56-86a0-91b052a647be/50651815682.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dediwodeguvotasarejoj.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/downloadable_graphing_calculator_ti-84.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_off0000e1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CD 5668 bytes
SHA-256: 406c71fa52e7c55b6ddead83ad59fa27442801074c120da7577fcfaec326cbba
font_01_sfnt_off0000f4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F0 10868 bytes
SHA-256: 226b4a17a304ca2dfb6ffa0c91ad2aa8d38fcf51399a6d5913f2ffa058ea5250