Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3a1c3699811a5a…

MALICIOUS

PDF

77.0 KB Created: 2021-03-27 23:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7359853bcde92406cceee75044f73a8d SHA-1: 90ef3258dca75bab914a9e454fa88f013291ea27 SHA-256: 6d3a1c3699811a5aa426f3c68f32b3d097593b091fee9181684159ce82a14fa7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'size guide'. The presence of an external URI and the ML classifier's high confidence score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xezojetit.ru/123?utm_term=darn+tough+women%2527+s+size+guide
    • http://bobixina.getenjoyment.net/relatorio_de_auditoria_ambiental.pdf
    • http://vomoliba.scienceontheweb.net/casio_fx_82ms_handleiding.pdf
    • http://mofemaruwek.sportsontheweb.net/5204512560.pdf
    • http://leseweremizew.scienceontheweb.net/73247185538.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zinudipir/is_chloroform_nonpolar.pdf
    • https://uploads.strikinglycdn.com/files/a02ad7ca-e91e-40f1-9ae3-fd991cc05d14/93486029699.pdf
    • https://s3.amazonaws.com/gurafoga/skg13c_gps_module_datasheet.pdf
    • https://s3.amazonaws.com/kexamoxusinixu/anglo_saxon_literature_characteristics.pdf
    • https://s3.amazonaws.com/defipedibe/adolfo_bioy_casares_poemas.pdf
    • https://uploads.strikinglycdn.com/files/fd3279f9-e631-426a-a625-4591b6c4bb43/97526569903.pdf
    • https://uploads.strikinglycdn.com/files/9e1dc96f-4aa2-4be6-a6de-c11684c988d4/91646800204.pdf
    • https://s3.amazonaws.com/difigomisosak/40096857229.pdf
    • https://s3.amazonaws.com/rivazixexuguri/word_for_detailed_report.pdf
    • https://uploads.strikinglycdn.com/files/474398fe-6138-44d2-a11d-e65a1a459504/24107858044.pdf
    • https://uploads.strikinglycdn.com/files/efaa442e-7e27-421b-81c1-40a6d5afbfae/rajerizujetoja.pdf
    • https://uploads.strikinglycdn.com/files/b0aac68e-e20e-4f2e-b02d-0ad5421164bd/88892343247.pdf
    • https://uploads.strikinglycdn.com/files/ac224799-d5dc-4959-8ac5-f705a4ee5110/69282431354.pdf
    • https://uploads.strikinglycdn.com/files/3159995e-cbe4-4098-956e-e0875a068dcd/how_to_light_char_broil_big_easy.pdf
    • https://s3.amazonaws.com/nosepevozux/what_is_tare_on_a_food_scale.pdf
    • https://uploads.strikinglycdn.com/files/2bf08bcb-c828-4f3e-b6d1-4cbd68e921eb/what_sound_does_heavy_rain_make_onomatopoeia.pdf
    • https://uploads.strikinglycdn.com/files/0e2aae10-65e8-4b05-88f0-63a6ca5949df/20139718618.pdf
    • https://uploads.strikinglycdn.com/files/dcb16673-6277-4c63-8a85-d1d96fe1d65e/ms_word_hindi_fonts_download.pdf
    • https://uploads.strikinglycdn.com/files/3a41c28f-1d98-4885-aab6-a0f219644843/what_is_the_definition_of_visual_perception.pdf
    • https://s3.amazonaws.com/miledu/how_to_find_providers_that_accept_medicaid.pdf
    • http://zogoxuf.atwebpages.com/37503384201.pdf
    • https://s3.amazonaws.com/kafises/80730380235.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_off0000f10a.bin
a1fec074a566f738a1d02e51c3e4c178987d54978f4e4dfe2b6b1a1526ad0f70
pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 5384 bytes
font_01_sfnt_off00010353.bin
c34f51923cfbfd6001d0d2ed6ea6e4d2a981acc17e9e392c2a28684a16710c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 10144 bytes