Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4bad26f9303f7a1…

MALICIOUS

PDF

76.6 KB Created: 2021-05-06 03:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 134a591111d0dc71d3063cb5c8c407e6 SHA-1: db3ba66aa0af7d95aa91a4fa3cacb1fa72e99300 SHA-256: b4bad26f9303f7a1eaf23abf721466afec8ddedeb3947ff1d0c25734a4e107fc
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, contains keywords related to evolution and application metadata, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=what+does+survival+of+the+fittest+mean+in+evolution
    • https://cdn.sqhk.co/fuwasokeg/EYgevjd/idsa_guidelines_neutropenic_fever.pdf
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/mutir_dodopaxega_fezovuwed_tojevitozutemin.pdf
    • https://cdn.sqhk.co/bomumuxa/ihbaJjy/21721464685.pdf
    • http://im-marceting.site/gusilur2v2f.pdf
    • http://kobopez.mygamesonline.org/fosipojijaxufojevudodixa.pdf
    • http://poxumanavofeboz.scienceontheweb.net/vezadexixukenerilivedovo.pdf
    • http://save50.pro/airline_maintenance_supervisor_salaryac1ia.pdf
    • https://cdn.sqhk.co/pibepufas/jiec8ii/colchester_sixth_form_admissions.pdf
    • http://blancer.xyz/subliminal_seduction_book_cover0k1vh.pdf
    • http://return-0.com/sd_tank_war_hack9k047.pdf
    • http://kirakexig.mypressonline.com/physical_health_definition.pdf
    • http://talajifit.mywebcommunity.org/16628898304.pdf
    • http://watogoda.mypressonline.com/91370372098.pdf
    • https://fereganew.weebly.com/uploads/1/3/4/1/134131887/bipilojo-baremilatabodar.pdf
    • http://bajifepeselok.sportsontheweb.net/gafekanutugesag.pdf
    • https://cdn.sqhk.co/sutazojawote/iahcBih/18124435045.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dobesogum/10459891572.pdf
    • https://s3.amazonaws.com/kiremefegonar/26338920814.pdf
    • http://purezaviwof.myartsonline.com/kipamewer.pdf
    • https://s3.amazonaws.com/pulujolatepuv/pt_cruiser_transmission.pdf
    • https://s3.amazonaws.com/rowubunak/linked_list_questions_and_answers.pdf
    • http://zaduzos.myartsonline.com/ragoxunajumugutiga.pdf
    • http://lojabupabavize.onlinewebshop.net/dupusugawupuke.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee42.bin
36cbd0e287c58fed44ce64658e051ce754586edc470c5b196c62fb49c894765f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 5220 bytes
font_01_sfnt_off0000ffea.bin
3c326e681acb7b84d526490e0c008b9736f643930c5c3b5e3aadbcd72004c014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 10696 bytes

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