Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf93b8f36e949f3e…

MALICIOUS

PDF

76.4 KB Created: 2021-04-04 14:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b7aa862d130a5003440e23e85ddf099 SHA-1: 5acf09ca10307d048651ca195db05a1104e6e811 SHA-256: bf93b8f36e949f3e882e6fa51411031bd6f2ae68ec56141d26a72e989bed6281
136 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack, potentially involving a password-protected archive. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/award?keyword=epidemiologia+clinica+pdf+fletcher
    • http://wazasutosas.iblogger.org/dedajetetod.pdf
    • http://bonboxstudio.com/51924624688wsdic.pdf
    • http://yatvoyya.fun/whats_good_on_white_sauce_pizzar6bo4.pdf
    • http://wugegifa.getenjoyment.net/zoguzupuxare.pdf
    • http://salleapp.xyz/hp_elitebook_840_g3_motherboard_price_in_bangladesh64mel.pdf
    • https://cdn-cms.f-static.net/uploads/4444123/normal_60473b1280185.pdf
    • http://mubalupuzapo.22web.org/austenland_book.pdf
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fe66aa85111b.pdf
    • http://wobepatonogez.iblogger.org/18999110903.pdf
    • http://comforfemj.fun/zufuwafupixapegelemigajeflfd9m.pdf
    • http://fdvsefwfrw.space/karcher_2600_psi_gas_pressure_washer_manualk54gs.pdf
    • http://zoguponuwuxoli.medianewsonline.com/alveolitis_alergica_extrinseca_2020.pdf
    • http://xidoxuj.22web.org/insulated_corrugated_metal_roofing_sheets.pdf
    • http://fodagirikazed.iblogger.org/famous_daves_pickles_nutrition_facts.pdf
    • https://cdn-cms.f-static.net/uploads/4452389/normal_60123d0a1a0c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/af6e921f-f137-48db-8cfc-6ed4ac20b9f3/boy_scout_abuse_lawsuit_commercial.pdf
    • http://zutaturusix.myartsonline.com/96053704300.pdf
    • https://uploads.strikinglycdn.com/files/9d81b420-2e36-402a-bdbd-30c76e338905/dailymotion_pride_and_prejudice_1995_episode_1_greek_subs.pdf
    • http://keberefan.rf.gd/ganuxevevowavuzob.pdf
    • https://uploads.strikinglycdn.com/files/2c9ff709-8647-40c2-90f0-d0ccc06999cd/how_to_read_tom_sawyer.pdf
    • http://tikimiwuwal.myartsonline.com/27706997194.pdf
    • http://febuzoremasovev.epizy.com/jaturemipekunedefifut.pdf
    • http://fixiwerasame.rf.gd/84881448857.pdf
    • http://nedilopasosugop.epizy.com/isoniazida_mecanismo_de_accion.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_off0000eae5.bin
379e0a45b3dfe9559c49231c57d419e8ff243d52d5d19f8b0040eedc7e9e4294		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 5348 bytes
font_01_sfnt_off0000fcf5.bin
73f1893f4b77905b444733ce57417dc29ab4b3716cda6b8f9e1f5c0d50b1c28a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 11584 bytes

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