Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e16516e22c103a…

MALICIOUS

PDF

346.4 KB Created: 2021-04-08 04:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef30785279014e1c3f987f42a9aa16a5 SHA-1: aa51d557428bdd32636c43102d2e7c5d5e3a9b54 SHA-256: b4e16516e22c103a0ccabc0fc868c3180b00bc1d93a01899ac8ad511ed2c80e8
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that redirects to a malicious domain. The document body, though heavily obfuscated, appears to be a lure related to a search query. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent, likely to direct the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9696

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://botokaw.ru/wix?keyword=katy+evans+real+2+pdf
    • http://zomolejefej.mywebcommunity.org/18254989365.pdf
    • http://bozesedixek.mywebcommunity.org/cells_and_tissues_anatomy_and_physiology.pdf
    • http://kokoponabile.iblogger.org/33425108696.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bovenotojitowe/xagopixoxabofirirokumib.pdf
    • http://levewome.epizy.com/algebra_de_baldor_descargar_libro_completo_gratis.pdf
    • https://s3.amazonaws.com/vovuzize/samsung_gt-p5113ts_factory_reset.pdf
    • https://s3.amazonaws.com/megodipewukitoj/pidilawura.pdf
    • https://s3.amazonaws.com/gogoxowiniza/genutagataborasonanub.pdf
    • https://s3.amazonaws.com/padadutiseni/35413561437.pdf
    • http://dixasimoxipux.rf.gd/cecelia_ahern_flawed_free_download.pdf
    • https://s3.amazonaws.com/pegozegi/98162119350.pdf
    • https://s3.amazonaws.com/gaxuremewuger/newsletter_format_publisher.pdf
    • https://s3.amazonaws.com/zozuxukoxo/capsules_slideshare.pdf
    • http://gajutovowitexij.rf.gd/govexibiwolif.pdf
    • https://s3.amazonaws.com/penale/pimisopavumamewadegod.pdf
    • https://s3.amazonaws.com/lijopavexanuse/aha_guidelines_for_anticoagulation.pdf
    • https://s3.amazonaws.com/xeruxaxer/pumuxena.pdf
    • https://s3.amazonaws.com/vufuzewasi/factorising_quadratics_differentiated_worksheet_tes.pdf
    • https://s3.amazonaws.com/xezujuxoz/wef_competitiveness_report_india.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/kanizibasubetenofebog.pdf
    • https://s3.amazonaws.com/veledabejufi/mosunisinarapimoraso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051484.bin
9fcc2536d22d39fa675d47df25d6be292a672ec852ed7b868aa9d30a86f6e040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51484 4928 bytes
font_01_sfnt_off00052566.bin
19af7682aa2dcda1f8893138e14a2c26224bc2e87dd10ef0ccf04ff2b390b0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52566 11488 bytes
font_02_sfnt_off00054c4f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C4F 4324 bytes

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