Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07e077cbd66b49d…

MALICIOUS

PDF

79.6 KB Created: 2021-03-21 21:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6358bf5b6b1b522e22c39552ba9b4f6f SHA-1: 775e9436e1dde19add949bc8d71d63fba09677f2 SHA-256: b07e077cbd66b49d914ba731c06234de0f2d6d06ecf2c6309a52f99fb3d63952
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as a Facebook developer sign-up page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to harvest credentials or deliver a secondary payload. No scripts were extracted, but the presence of an external URI and the document's deceptive content point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/123?utm_term=facebook+developers+camera+effects+platform+sign+up
    • https://cdn-cms.f-static.net/uploads/4403959/normal_6014c9abc0103.pdf
    • https://cdn-cms.f-static.net/uploads/4451375/normal_60110335ec51c.pdf
    • https://cdn-cms.f-static.net/uploads/4493579/normal_601b7ae8cb186.pdf
    • https://cdn-cms.f-static.net/uploads/4453118/normal_5fe8be320ad0b.pdf
    • http://niwimimotejus.iblogger.org/how_to_draw_a_face_shape_for_beginners.pdf
    • https://cdn-cms.f-static.net/uploads/4367959/normal_603dec726bc0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavifunaruvi/judokaxodifeluw.pdf
    • https://s3.amazonaws.com/genedesowul/metal_door_design_catalogue.pdf
    • https://s3.amazonaws.com/pazatuv/lexique_developpement_informatique.pdf
    • https://s3.amazonaws.com/nevowimo/bollywood_movie_site_for_pc.pdf
    • https://s3.amazonaws.com/jopomodilamego/consumer_reports_vacuum_canister.pdf
    • http://wiregenuris.rf.gd/93350691710.pdf
    • http://zejagal.rf.gd/gofuzivuwikevowabaped.pdf
    • https://uploads.strikinglycdn.com/files/12d58096-e5ad-4291-bfe6-299606ced065/will_there_be_a_sequel_to_captain_underpants.pdf
    • https://s3.amazonaws.com/toliwudalamem/contrato_de_alquiler_de_vivienda_ejemplo.pdf
    • https://s3.amazonaws.com/mexesazaxasa/kowejus.pdf
    • https://s3.amazonaws.com/panalipolifod/health_o_meter_digital_scale_instructions.pdf
    • https://s3.amazonaws.com/ganubifirigevi/reiki_healing_classes_nyc.pdf
    • https://uploads.strikinglycdn.com/files/efa21485-1c9d-4157-8a7a-7fb0b19dca08/the_art_of_the_start_2.0_ebook_download.pdf
    • https://s3.amazonaws.com/rakabexozu/vufofabulisij.pdf
    • https://s3.amazonaws.com/megujobemegor/16625684394.pdf
    • https://uploads.strikinglycdn.com/files/ce68290d-8b07-4c41-b9d3-993073b89829/wuwolonigavukufeno.pdf
    • http://defurujaligat.epizy.com/15154623221.pdf
    • https://s3.amazonaws.com/fedojigudaj/atem_software_control_download_for_mac.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_off0000f8fb.bin
2de7eb101289248a964567f1695d1eacf1ff2b9f6de7e2c54a89157f66164f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 5692 bytes
font_01_sfnt_off00010c4e.bin
905f45a819fab1524583eb0e09adca901ab9211a66e19bc8e5bbcbadc77c5d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4E 10528 bytes

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