Malicious PDF — malware analysis report

Static analysis result for SHA-256 57efb0bb4ff285fd…

MALICIOUS

PDF

79.2 KB Created: 2021-03-22 00:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9d3d37451de151216b48b828d26af3a SHA-1: 5614af98d59ac08873fc53322d31d617fbbd3881 SHA-256: 57efb0bb4ff285fd5e0e7b6757b3af54bc472477f3f9c2931e27cc95533d8a24
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs within the PDF structure suggests an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=echo+pb+1000+leaf+blower+reviews
    • http://vvinorama.website/25333263769526ei.pdf
    • http://babysampler.com/parasitologia_de_botero_5ta_edicion_gratis68m6g.pdf
    • http://natnat.fun/7622037236647f5q.pdf
    • http://noksipals.online/echo_cs_400_carburetor_removalylqvl.pdf
    • http://fupofejoja.22web.org/bonafide_certificate_format_for_student_doc.pdf
    • http://servicesforsupport.com/xubivakejotufogejifilblv4.pdf
    • http://jojidasusesot.sportsontheweb.net/solving_and_graphing_inequalities_worksheet.pdf
    • http://tepifugamokeg.medianewsonline.com/alinco_dj-500_programming.pdf
    • http://grantmedica.ru/what_does_having_dream_about_being_pregnant_meanbfm1w.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1f7c777b-a92c-40be-a7dd-b74954cd48de/sofowuk.pdf
    • https://uploads.strikinglycdn.com/files/48686116-9e15-4586-a0a8-ea139c538ee3/dudasalejativ.pdf
    • https://uploads.strikinglycdn.com/files/3e522ce0-17b3-41ad-a05a-967717d04603/the_alienist_season_2_episode_8_review.pdf
    • https://uploads.strikinglycdn.com/files/8e90d435-eb09-40bd-837b-c4f3aed96aa4/free_online_graphing_calculator_ti_84_no_download.pdf
    • https://uploads.strikinglycdn.com/files/b8f35f73-3444-4ed5-a838-2ba3fd1f8ad3/watibupuzewilepoxip.pdf
    • https://uploads.strikinglycdn.com/files/742a9c40-e006-4626-8667-d266bc7832c1/names_nombres_by_julia_alvarez_summary.pdf
    • https://uploads.strikinglycdn.com/files/452514ee-4714-447b-99f6-a2888122d9e9/price_jhangiani__chiang._2015._research_methods_in_psychology_second_canadian_edition.pdf
    • https://uploads.strikinglycdn.com/files/3bb78747-c1f8-4af1-ad0b-a0fcb81d36e0/the_strongest_steel_is_forged_in_the_hottest_fire_meaning.pdf
    • https://uploads.strikinglycdn.com/files/7b1364ba-f11d-4b07-85f1-f42fecfc37df/como_instalar_impresora_hp_laserjet_m1212nf_mfp_wifi.pdf
    • http://sarutufasiko.atwebpages.com/ecology_class_12_ncert.pdf
    • http://rofixalo.epizy.com/import_yahoo_finance_data_into_google_sheets.pdf
    • http://sajurewe.rf.gd/sesileba.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_off0000f620.bin
3c79a56a4f48fdf3c5510d97b97e9468e817ef2c8a48b0c2fdac2ab21a626933		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 5544 bytes
font_01_sfnt_off0001091a.bin
dcdf9fc42209406fb0ee9fc48b6bef1f6981749ff829d653a8ce8480ef9075e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 11180 bytes

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