Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ade8b728bd63c82…

MALICIOUS

PDF

74.9 KB Created: 2021-04-14 12:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8d1048d9a289ff2d0caf92afca066443 SHA-1: 47c816ca6fd8e55c862d83820a2590a136f6b0fb SHA-256: 2ade8b728bd63c82bbb291614bfcd5949df24397c717a1dd2e958f1547260cf2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that points to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a periodic table.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://vilenefex.ru/strik?utm_term=tabla+periodica+con+sus+grupos+y+familias PDF link annotation
    • https://cdn.sqhk.co/pegipoveridi/hdjgOjj/sowidezoda.pdfIn PDF document text
    • http://fexabudobix.getenjoyment.net/ergogenic_aids.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/geviigc/10223018485.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/28570268274.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zomimek.epizy.com/sample_swot_analysis_template_word.pdfIn PDF document text
    • http://sitasuwa.epizy.com/bopatopetogobikipedivisum.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/manazigezusolujitujasel.pdfIn PDF document text
    • https://a91f1da9-0b84-486d-9199-d95c2ecdf19f.filesusr.com/ugd/82421a_79b3f3ab428c4ccb83b384ecf8e7920c.pdf?index=trueIn PDF document text
    • http://bafuwujix.atwebpages.com/capral_aluminium_extrusions.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/calculate_3d_surface_area_arcgis.pdfIn PDF document text
    • http://wififeju.atwebpages.com/lenujerokuja.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/73206645335.pdfIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_1e1e1443e3a4460187b12c5915602365.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_877489948c0443628c3dce4d0e7a74d3.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_24aa7ee35512490bb9274e440be9b9f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gomakobez/automatic_control_systems_always_include_three_things_receptors_effectors_and.pdfIn PDF document text
    • http://lojarine.epizy.com/js_base64_to_file.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_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 5668 bytes
SHA-256: 85c666bbc8b614d50c2097af6469a05595144d0695ffadec6bed8c1381b48710
font_01_sfnt_off0000f794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF794 11568 bytes
SHA-256: ff45e2970ec67db25f1a2661c9bdf44de3c60b0151aacdfb1c5430bd973cf2a0

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