Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c9f8177728eb19…

MALICIOUS

PDF

75.5 KB Created: 2021-04-01 16:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 860738d20c8b4c474d4e590870d0a44f SHA-1: 507118bd2fffb59b3a12074f184055e6e8418ea0 SHA-256: 48c9f8177728eb1976246c48734fcb8c00d5156ed0c1f0356194c3a74b5411f9
132 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to redirect the user to harmful content. No scripts were extracted, but the PDF structure and linked URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/wix?keyword=warwick+child+care+fox+news In PDF document text
    • https://cdn.sqhk.co/xavonepez/jDhajcr/roxaboxumokopudobulerot.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/how_many_scouts_are_there_in_australia.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/junuzenapiledo.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/hihg8so/10277113655.pdfIn PDF document text
    • https://cdn.sqhk.co/rabetejorazi/0gijhcE/descargar_broken_age_android_apk_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/E5ieR7M/street_rods_for_sale_charlotte_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/narobalof/Hjhqgj0/titamubiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/4Njxhg1/asteroid_passing_earth_nov_2.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/eNjdtje/zanav.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Bgejeib/musiwidefozelusata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginowane.onlinewebshop.net/wild_game_trail_camera_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6797c3c-076b-468c-83a5-f6d83a643074/reading_comprehension_grade_3_multiple_choice.pdfIn PDF document text
    • http://kodadus.epizy.com/57729026288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b9d883-bda9-4924-997f-27f3456a53ad/vibufe.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/ihsa_basketball_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be634a76-c008-4615-aa43-2f1fb49fd6b9/printable_for_dummies_book_cover.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/grasslin_timer_gm40av_instructions.pdfIn PDF document text
    • http://wekameti.rf.gd/online_editor_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee7cfaa-51ca-493a-b559-aeaf679988eb/dodogilunali.pdfIn PDF document text
    • http://xegiseko.epizy.com/40556462435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82a7939-bf5b-463c-aa52-382828f33130/sct_livewire_ts_mount.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_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5344 bytes
SHA-256: 06ec38e5545583180e6f5c8fe0ba076c0cd00dfa1de6e855c581ea4935a5aa4f
font_01_sfnt_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 11568 bytes
SHA-256: c17aa9b79624e719dfbf794b69219bfbc438b9921dc30bc1c8c0d70bc4a1e180

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