Malicious PDF — malware analysis report

Static analysis result for SHA-256 87834e378f840f4d…

MALICIOUS

PDF

91.0 KB Created: 2021-03-14 14:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e7762930646b5d3d28c0453711520cf SHA-1: b8b6dfb35e49f7ae2718a09bc18520728853e083 SHA-256: 87834e378f840f4d64217bf10cabbba9a50082b108502e8b23e7251b172d333f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, but does not provide clear instructions or lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/wix?keyword=los+dioses+deben+estar+locos+netflix PDF link annotation
    • https://cdn.sqhk.co/finelega/gghajgQ/wugidupefipejureviwofexe.pdfIn PDF document text
    • http://catsism.com/tafsir_ibn_kathir_english_audio_downloadh5jv1.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/96007957809.pdfIn PDF document text
    • https://cdn.sqhk.co/salipini/hb9nWgi/canon_eos_700d_instruction_manual_english.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/gcibrjb/beat_the_boss_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/viruvagixe.pdfIn PDF document text
    • http://japancar-sib.ru/how_to_program_comcast_remote_to_magnavox_tvcjly1.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/international_lawyer_jobs_nycksqzn.pdfIn PDF document text
    • http://doorstepcomputers.com/4851619862506ife.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/how_to_work_step_4_with_a_sponsee.pdfIn PDF document text
    • http://pelistens.xyz/ark_survival_evolved_mod_apk_ios1c6li.pdfIn PDF document text
    • http://yandex-delivery.cc/what_did_charles_discoverzjxxl.pdfIn PDF document text
    • http://gta-msk.ru/the_chaser_by_john_collier_plot_analysislj104.pdfIn PDF document text
    • http://ouily.xyz/wofidomokaxewugovebiceboe.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/sony_dav-tz140_5.1_review.pdfIn PDF document text
    • https://cdn.sqhk.co/mekewufi/dBto9jh/family_island_farm_game_adventure_apk.pdfIn PDF document text
    • http://gbarb.me/vutipuwt5x1m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc7058c-5dcf-40bd-8302-58931b5ca15d/what_surahs_are_in_each_juz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f44f23-2992-4f3f-b339-1f3397591821/87216188411.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/windows_server_2012_resource_kit_tools_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/777f9c61-b9d5-4841-9928-ed87d2062953/nedukililefoxaxizelivoxol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 3304 bytes
SHA-256: d89404ddebf543d21a124f7bdf54d87f5d97515f76b428ebcb3557ba6926ddeb
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 5164 bytes
SHA-256: acb2ed52beea5509b7c1c254af8547c2f6c2344ce3bc4c5a391edd6154f14341
font_02_sfnt_off000115a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A1 2316 bytes
SHA-256: 5636d8d5fdd5a113ad317891756ad04021119b75fdafbfd8e21eb483790aa3d8
font_03_sfnt_off00011f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 12424 bytes
SHA-256: f7197eb3eb3d3a822636fd78edc085ec6d055bc71e50196d08065755eb7db02e
font_04_sfnt_off000146e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E3 16028 bytes
SHA-256: 6e14d9a23925fbdd927c7db5f893cbd4d80a19524b1aae448d44ee15d2611241