Malicious PDF — malware analysis report

Static analysis result for SHA-256 c170667ac3415850…

MALICIOUS

PDF

78.9 KB Created: 2021-03-18 09:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c4d311b9b8b4fecd9c76e2e09bdc9d9f SHA-1: b2c04aa0e3b86bbb3dd86686273d28c3d0ca9e30 SHA-256: c170667ac3415850d29f69b31997be4ae1bb9d42217e4b6a24d46f41b2a0b745
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=coordinate+conjunction+list+pdf PDF link annotation
    • http://stroymarketmetal.ru/xowemodot019o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fdfda1b7d5fe.pdfIn PDF document text
    • http://com-copyrighit.com/74823383805d81vx.pdfIn PDF document text
    • http://gazzsheff.xyz/pudexekevoxuropugufizo354ye.pdfIn PDF document text
    • http://wegisinebirixe.iblogger.org/asvab_for_dummies_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_60171a67ce485.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/dhaIWig/zumagarenobirinik.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/s6MiaFr/rebel_cops_end_turn.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hiFgfBl/tilojimegipuk.pdfIn PDF document text
    • http://todolosepaxo.iblogger.org/98918293711.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/eheifge/temple_run_game_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/dlaHicX/wirufexusatufememon.pdfIn PDF document text
    • http://good-production20.site/lumen_ohm_answers_college_algebra96ym4.pdfIn PDF document text
    • http://kyukty68.xyz/bakufolutaxagolofimoot45a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzezoma.epizy.com/resistance_bands_workout_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7048860-a6c0-4d47-9d37-8fd3eb207dfe/comparison_between_leader_and_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ccbf5e-7ea1-4b9d-88ac-1a0e440f7c43/dell_u2410_price.pdfIn PDF document text
    • http://vivusefodubelep.epizy.com/sufovapak.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/18506972110.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/falobemuraderik.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/9812495098.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/2013_dodge_charger_sxt_rwd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b0fa04-ee89-48fb-8fad-8d7b3aab7848/institucion_general_del_misal_romano_tercera_edicion_tipica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51588cdd-dbde-409c-81f5-c34ec1add9ae/who_invented_triangle_offense.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_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 5132 bytes
SHA-256: 4ed83fbbf5f0ed4e3ac3e54e256e743ba06c791bdbbe96511fbb7a3df3445c68
font_01_sfnt_off0001099b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 10616 bytes
SHA-256: 42b8b95748beaf95ff7490957b1acd10bab3996c5bedeca6bb77131fed0855b3

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