Malicious PDF — malware analysis report

Static analysis result for SHA-256 428ea02c3a1b7b70…

MALICIOUS

PDF

116.7 KB Created: 2021-02-20 09:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 621f224dd730c47c0f278d2bfac9f541 SHA-1: 5d10c2f0604b492533a6072e0df075df4468529b SHA-256: 428ea02c3a1b7b70d7121c750940a8c2cccb9222538f7af4016f2e0430fdb6de
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'stress relieve stainless steel' to entice users to click the embedded link. The presence of a PDF URI heuristic further confirms the attempt to redirect the user to an external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=how+to+stress+relieve+stainless+steel PDF link annotation
    • http://lnstagramverifiedsbadgesforms.com/janjos_lepa_brena_udjid9qv1.pdfIn PDF document text
    • http://ch-redirect.icu/986641150941gh3u.pdfIn PDF document text
    • http://povar2020.site/legacy_xp_2.0_fullwup76.pdfIn PDF document text
    • http://erogan-oficial.site/fluent_in_3_months_benny_lewis_free_downloady2ake.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fc944427d16d.pdfIn PDF document text
    • http://bubble1.space/adobe_acrobat_professional_latest_full_version_free_download00dmv.pdfIn PDF document text
    • http://tovarajuxelogag.iblogger.org/cbc_manual_differential_interpretation.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/fewunadupop/dieta_doktor_budwig.pdfIn PDF document text
    • http://mesesoriran.epizy.com/29388691086.pdfIn PDF document text
    • http://pababevo.epizy.com/cavatina_partitura_para_guitarra.pdfIn PDF document text
    • http://juropap.rf.gd/67752342327.pdfIn PDF document text
    • http://tivapatovike.epizy.com/runojevo.pdfIn PDF document text
    • http://zodazuwofapodu.epizy.com/vuxon.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/robin_hood_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/28785606677.pdfIn PDF document text
    • http://tekoboworitutew.epizy.com/autonics_temperature_controller_tz4m_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/59235724907.pdfIn PDF document text
    • http://waminakukivexo.rf.gd/86170278374.pdfIn PDF document text
    • http://rawupegidozu.rf.gd/46195022380.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_off00018a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A89 4792 bytes
SHA-256: 8d5a0fc264276f4b8da19799fa94f8c88e6e2fbeccb7241577d8bb4be72f890e
font_01_sfnt_off00019af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AF5 12148 bytes
SHA-256: 0224651b2418327f1dbda103d559a8979699e3bfdd543b1d4b49e73a467c3d01

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