Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdc18d84870e2b4…

MALICIOUS

PDF

96.4 KB Created: 2020-12-30 20:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 837f579107ece238b58ba3e6dcc380c4 SHA-1: 784fdeee0c4b8e743f0630fe594522244dc58267 SHA-256: 1cdc18d84870e2b47addc6b9a249e43797f79e1e0802d3842fd8f1f2e5668429
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://traffmen.ru/123?utm_term=webelos+den+leader+guide+2015+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4365575/normal_5fca0adf2cf3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fcb3a5a4863f.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/dkk3Yic/37421036613.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/tesapibebujep/dota_2_underlord_hero_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7eb051b-1779-4d9c-b0e6-8c6365b0110c/skull_wallpaper_border_for_home.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/understanding_demand_worksheet_economics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00e646b-ad0e-42af-aaa8-42d8f1105a9b/27152345257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2b784f-6a46-4eea-a9be-d939ba6b94bb/vuguxaxerabaximumit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b007b781-c222-4b8a-9e1c-bb61b5cdde07/wonozadiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6113d8-c953-4505-b231-716fcd70c367/35186925078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d37c293a-2e0e-423a-b493-b7bb5bfeb7c5/49283940588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadec14b-2575-4039-b829-98942c8bedde/vozejo.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_off000139f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F5 5812 bytes
SHA-256: 8181065052e97c6cfc88f3d1e2f4d89ad7fdea3c0d5cfbb1ebe3205e9e398e3b
font_01_sfnt_off00014ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDD 11516 bytes
SHA-256: a026fb7f7dfc2e2e22d6288892475b896f72142526317d663dac3bacbd8b9ea8