Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bffd5e20cb06619…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 14:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0e728607110a6044aa5dc38a9e823e2c SHA-1: 865474d23d72b5ef3505cf414bc49ec1818ac8c5 SHA-256: 9bffd5e20cb06619e5f75be0d6627379efe16fe5a29ada500ebb608aebc08bea
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=volume+pills+reviews+yahoo+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382770/normal_6004386e67961.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/LEhdgHI/double_dragon_trilogy_pc_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jefutubup/LKjdgdi/red_boy_pizza_fairfax_coupons.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwonukunav/Gjcagdo/27623880143.pdfIn PDF document text
    • https://cdn.sqhk.co/bataseset/23hcigm/blue_apron_menu_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_6024614dc0eb4.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/kovifatewor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5fdf4ae102051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd172af52572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_6034097e9139a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_60361000da234.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/sjfhfJb/suwapakumamedojebim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417315/normal_60069abe7bca2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ed82b7-08cf-483a-aa5d-8dc37f67aac4/how_to_override_washer_lid_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b7147c-887a-4e30-8a3a-0613b34fd72b/kubekami.pdfIn PDF document text
    • http://benamow.myartsonline.com/kapirijefedebaxutedowufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2287e6c1-7f34-4e9d-a5f7-a5a71d460a67/what_is_the_nash_equilibrium_and_why_does_it_matter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568577e2-292a-417c-95cc-bdc560b5ebb5/ratutupazirarezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b4b25e-1e1a-4734-8596-283e33946c30/dugosilikatizeselobuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64e01eb-844c-4aa7-83e8-4219c04bb5df/cuanto_es_3_4_pulgada_en_mm.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_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 5280 bytes
SHA-256: ca624d29e4eb94cf6fa3a973c1a1e9033c55a2d88886715a26ca7a1d77c0e267
font_01_sfnt_off0000ff40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 9520 bytes
SHA-256: 3debb5d0c94471cbbd271115ce0b1ed91a511f5b8ab2bceb268e2e6fe50d0e8f

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