Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0d3fc212718eb2…

MALICIOUS

PDF

85.4 KB Created: 2021-05-07 22:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4cbcd3407792e62228b3345948934f1c SHA-1: 45bbbfbd5d927a92a95c01207d6425ab7c70df86 SHA-256: 2c0d3fc212718eb276b0ddf133d4780e139d9b440426a875d7f7a549c3f96152
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=ejercicios+gramatica+b2+espa%25C3%25B1ol+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369904/normal_5ff5c53fcde3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416513/normal_5ff25602a4637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_6058bde875eb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_5fd132b83eee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423431/normal_60060077eda4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_6030963191690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fc938690f337.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/sefiwegegagu/transformer_garage_independant_en_habitation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19fff53-11f5-4099-a6f5-3181f1175589/zasuloxabefokuxetowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b187ee68-eff0-407f-84ad-6d06e7e0adc3/usps_customs_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549cdf58-125d-463f-b6aa-d93eadf482c7/1.3_composition_of_functions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8352fdb6-77b0-4d45-8077-d41733171a0d/quicken_print_register.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90ca4d0-103e-4b93-8ab2-f1d80f5284e5/sql_for_beginners_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/how_do_i_say_love_in_other_languages.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/vipasadopabuvadoxufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64151244-a9a3-4670-adbd-d2f7f5110ccd/beats_solo_hd_wireless_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b24a8be-b79b-4c20-b184-c16166ee4f44/natotejaloximorinel.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/gaxiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51541157-c830-49c2-aea3-af4cc764076e/tom_clancys_rainbow_six_siege_video_game.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/cub_cadet_lt1045_deck_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/soxesulujiwonusogovosobe.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_off00010a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9E 5992 bytes
SHA-256: 40b89854d298ba06332b80753910bcd56979e46669d5672e867d54186413b28d
font_01_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 12268 bytes
SHA-256: 8af712d0e75ae1bb01db1953e681eb737a113de03befaf177c4712dae9dbc49b

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