Malicious PDF — malware analysis report

Static analysis result for SHA-256 445967b7316b83a5…

MALICIOUS

PDF

69.3 KB Created: 2021-01-08 15:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 92cdacc16b61a5afcd799de422197fab SHA-1: 25148ee8e131ae9660f13747b4cf9ae5d378b2fc SHA-256: 445967b7316b83a55b718bd2e9ce2f47125cc9218518a72bee4e80a5db0f6090
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely a malicious domain used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to 'sum of interior angles worksheet pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=sum+of+interior+angles+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fd79fa6db92a.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/fhhrlge/cold_pathogenic_disease.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa0a8d68dc54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fcecff40f32e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388062/normal_5fc760c69ad77.pdfIn 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/730b3e3a-6690-44fa-81fa-58e42d52d61a/status_saver_app_for_whatsapp_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3246f4-d9a9-4508-a004-afeb6cc50a11/noteraliboxipakuvire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa174bb-50d2-4435-9f87-0765c1f23a4a/57823769868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffd47d9-78d8-40f9-a8bf-7255578c2112/ucsd_acms_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ac0518-1f1b-462b-98a3-9fdcdc48df04/16154342314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d433742a-3c7e-4896-a850-f3c19ab43c9d/mugozegifowujidoviwofada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18b37f0-6097-4d2f-8259-c0761c35eb45/protist_webquest_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1794de5a-9ed4-4e1c-9584-bc83ca578c0f/how_to_do_the_hack_in_hungry_shark_world.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_off0000d24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24B 5716 bytes
SHA-256: 6254cefffc72667fcc8fb60710c9cd7274cf6427b6ef183da6eb67c4dc0793b0
font_01_sfnt_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 10140 bytes
SHA-256: ee1d0b536681d693980c165d656a8018e7be88998426797bfd41f8fc5ad05114

Open this report in the interactive analyzer, or submit your own file for analysis.