Malicious PDF — malware analysis report

Static analysis result for SHA-256 004883a18f8b2d81…

MALICIOUS

PDF

68.4 KB Created: 2020-11-27 10:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3b83c0c220311e870f6166fa72497f3d SHA-1: dbbd70ac1b0cf969e0fb8d250c15cc2706bfde6f SHA-256: 004883a18f8b2d810c25e7faba8221358adc3dc6d2a1751fd107833ed7041b93
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL 'https://traffnew.ru/strik?utm_term=stanford+library+hours+lathrop' is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Stanford library hours lathrop', suggesting a lure to trick users into clicking the malicious link.

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
  • 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://traffnew.ru/strik?utm_term=stanford+library+hours+lathrop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5fa304721940f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8eddd64210f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475716/normal_5fb2c3aeed16a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5fadbf8196bc7.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/a6758b47-940c-420b-ad0b-f1dae715738c/74720163402.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vudadija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59bbceee-9731-4548-8e6e-c223c23579bc/teoria_de_mcclelland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501f6204-1ac9-41af-aa0c-c8c975d5e6e5/teorias_de_motivacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1501b0c-02ef-46ae-ba6b-9772c288447c/22354635725.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/christchurch_primary_school_ilford_ofsted_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0de486f-1ed3-4fdd-84cb-08cff150019d/gta_san_andreas_apk_cepde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebec8d7b-4f3d-4d8f-b0ac-71879aafbf9b/logic_games_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acb92e8-0346-4a3d-8769-a537ca02f447/roomba_vacuum_650_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d25c06-5d01-41c7-875e-4d0db5186bc9/minor_league_baseball_marketing_plant_city_fl.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_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 5476 bytes
SHA-256: f9a4138e3423fe67cbf2851ff3a628cc1de4455c5978d530c580ca5afa74a3c1
font_01_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 10880 bytes
SHA-256: a7285effab415ccef6b677f6e9914c4dc1347ef6bf3f18fdd099f0f517b11ed8

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