Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcea5c516dedb275…

MALICIOUS

PDF

74.8 KB Created: 2021-03-30 05:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4b3f2460cea3db0f4d8c088c8621b51 SHA-1: cbca925b755e8d7481960da0a44c413b31150219 SHA-256: bcea5c516dedb2759bd21c4553a62827b285212a777c67f05472aadccbb39c36
96 Risk Score

Malware Insights

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

The file is a PDF that contains an external URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/award?keyword=hiperaldosteronismo+secund%25C3%25A1rio+pdf
    • https://cdn-cms.f-static.net/uploads/4382201/normal_601d61a2aa7af.pdf
    • http://jolamuvinuma.iblogger.org/what_kind_of_oil_does_a_gas_pressure_washer_use.pdf
    • http://kosonetibekub.medianewsonline.com/jujimisevemolumageg.pdf
    • http://meetsucre.pro/36676428387tmsto.pdf
    • https://static.s123-cdn-static.com/uploads/4481272/normal_6007d8465eb2a.pdf
    • https://static.s123-cdn-static.com/uploads/4425908/normal_600921fab183a.pdf
    • http://xalelokepevidon.iblogger.org/2357263058.pdf
    • http://tetiviguxawik.getenjoyment.net/what_is_the_best_portable_carpet_cleaner_for_pet_stains.pdf
    • http://sokojutefame.iblogger.org/problem_and_solution_essay.pdf
    • http://itabody.space/savomufc1ha.pdf
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5fcb1ff4658b5.pdf
    • http://rubisteq.online/73414668824spftp.pdf
    • http://pasetbs.xyz/descargar_diccionario_biblico_nelson_gratis07s4p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farowug/ropewubokuvitagajovubu.pdf
    • https://s3.amazonaws.com/genedonapubefe/ordering_decimal_numbers_worksheet_year_4.pdf
    • https://s3.amazonaws.com/regovadeje/sample_ontario_affidavit_form.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/banerji_protocol_for_eczema.pdf
    • https://s3.amazonaws.com/risalenefazozo/lg_inverter_direct_drive_washing_machine_filter.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/88016210925.pdf
    • https://s3.amazonaws.com/sugosubexez/what_is_boy_scout_class_b_uniform.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/free_etsy_business_card_template.pdf
    • https://s3.amazonaws.com/mesixadelomomo/pinofubobimuzuwo.pdf
    • https://s3.amazonaws.com/vikukinumet/poluduguxizojegot.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_off0000e2f5.bin
afaa05a9d2720de88e4175ee9405d13506730f3afea3201012f2115daaff859f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 5496 bytes
font_01_sfnt_off0000f501.bin
bb09607a0da7ea9c7f9b6ae69ad4c8008f8f2e8b61df1e3c5fad4851e122c650
pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 12800 bytes