Malicious PDF — malware analysis report

Static analysis result for SHA-256 593a99500a7a1093…

MALICIOUS

PDF

101.0 KB Created: 2021-03-27 15:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d22c65999d8493edb984fdcc9fa9df9b SHA-1: 59545ddb77691ed4791806e689d94dad89fecf91 SHA-256: 593a99500a7a1093922bdc7a26676c99e33edacbce0529dad26a20dbd196ba95
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://druttle.ru/award?keyword=advanced+microsoft+excel+2020+training+pdf PDF link annotation
    • http://meine-gebuhrenfrei.com/dewazufw5qa.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/iifzbQ1/mesa_de_air_hockey_profissional_usada.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/eIJUgjr/facebook_messenger_mobile_data_usage.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/fhfsEjf/cute_pet_animals_hd_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/fypjagd/1264279541.pdfIn PDF document text
    • http://santecmb-sarl.com/biblia_de_jerusalen_latinoamericana_buena_prensapbx9t.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/fge0Aia/dune_2000_cast_game.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/ifk7icg/nbc_sports_predictor_payout.pdfIn PDF document text
    • http://manthoughtswebsite.website/can_i_use_vicks_vaporizer_with_essential_oilss69fn.pdfIn PDF document text
    • https://cdn.sqhk.co/mareduviger/djjFzEM/50105774655.pdfIn PDF document text
    • http://nat-fru.space/stranger_things_season_1_subtitlesnfzye.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/ea3d620d-d101-46c3-b239-77196eaeea8f/33472221773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4b0a20-cdfb-4c1e-b11b-bb73b8a4db8b/72864200342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c96167e-3adb-4fab-b892-6e9c4be2949e/football_manager_handheld_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10344f16-0e0e-4a3c-81f2-c81bfdc701bf/digofogibirabategumuxomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9e35c2-f4d4-4a48-a38f-db6724dc4c9f/1206739376.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14305 5868 bytes
SHA-256: 9b91b96e321bbd21ef6a71924c45950f5520a3bd7c053a27444acd32850b2f04
font_01_sfnt_off000156eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EB 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00015f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7B 11228 bytes
SHA-256: dc0043923e41101218fa43784be0773a5947b04654c8d36c895512eff6feb342

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