Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b01085a4a2b6e1b…

MALICIOUS

PDF

82.2 KB Created: 2021-05-15 23:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 59d3795181418deeb04870b85c4f60cb SHA-1: 28b4aa7c2f41a0387085c88f3f0fdc5f5522e779 SHA-256: 2b01085a4a2b6e1bada3b9ca69de8c3ff3e21ccd6484a1ef50f31f314427fe8a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though partially corrupted, suggests a lure related to educational exercises.

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
  • 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://jottigo.ru/strik?utm_term=ejercicios+de+escritura+para+ni%25C3%25B1os+de+tercer+grado+de+primaria PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485689/normal_602ace707df0c.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/9223621.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/finomowar.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/animal_reproduction_worksheets_for_grade_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473947/normal_60073bb38c3ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5fe1330b391b7.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/6e41a.pdfIn PDF document text
    • http://wugegifa.getenjoyment.net/ag_economics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_5fd0e3d474172.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/gobunanupe.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/fewiluvomomu.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/2355622.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/bemukuxenevegozupex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_60276ab5a0682.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/begijufadi/street_fighter_4_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/fuminufuj.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/small_and_decentralized_wastewater_management_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/21172513641.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/80004657044.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/avengers_wallpaper_hd_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/cancer_information_analyst.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_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 5608 bytes
SHA-256: 3e55a97b0464e14d4e7c3f7e300b4a32f3f1b10423708eea8c4e95df91bb8667
font_01_sfnt_off00011198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11198 11940 bytes
SHA-256: 00aaebabfb2e95a3e428b7cea41d1d1a59b471a5368d00b6597d0ba9ee4f27ab

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