Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8a4a08b3158aeb…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 00:35:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7cb54bd729afce1c7eaaab00549e2306 SHA-1: 998f7534e05f014399cee407368f72b44e8a3e14 SHA-256: bb8a4a08b3158aeb7a320aec4dadcb668bff46545199bc3f425cc5c6a267510f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a phishing site. The document body, though heavily obfuscated, contains text related to a search query, reinforcing the phishing lure.

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://vilenefex.ru/strik?utm_term=how+did+ernest+holmes+die PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455377/normal_6007ceb80fc7f.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/ieicvid/ice_cream_rolls_youtube_face.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5fe75599b8702.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/ie4jihg/email_form_html_w3schools.pdfIn PDF document text
    • http://tizigigukaj.22web.org/college_level_algebra_worksheets.pdfIn PDF document text
    • https://napuguzexavuzes.weebly.com/uploads/1/3/4/8/134875267/defipowoweku.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/bexigewujizageg.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/hhamgfZ/26652850527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488837/normal_601700e7b1f93.pdfIn PDF document text
    • https://josozigigararu.weebly.com/uploads/1/3/2/6/132681886/sowavabe-zowikisol.pdfIn PDF document text
    • https://fasukawoj.weebly.com/uploads/1/3/1/4/131453618/bunezudugu-dozadum-gupekibenu-fanofagerabe.pdfIn PDF document text
    • http://vugijow.iblogger.org/betaxakirixekukakiwinix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kitasiru.epizy.com/converse_altas_negras_plataforma_corte_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/ponitisobifojol.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/59157246080.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/cocoa_beach_weather_surf_report.pdfIn PDF document text
    • http://solatilexi.epizy.com/acrobat_x_standard_edit.pdfIn PDF document text
    • http://sejojoxo.epizy.com/guided_reading_activities_eyfs.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/ammyy_admin_3._0_free_for_windows.pdfIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_8b495cd2532949fdbda15de42f54724c.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_8c3acff65b504eb4b7ce297cfd5f264b.pdf?index=trueIn 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_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 4908 bytes
SHA-256: 7a796db81c5f5311bb8aef23e00be60e280eb044d773ac3cf72abee60dc2ff09
font_01_sfnt_off0000ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 11076 bytes
SHA-256: 0efbf88760c10651e7cfe1b3034851e61644621eba245ad9551e79a0fff8f507

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