Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a7c39841bf8b4a…

MALICIOUS

PDF

79.9 KB Created: 2021-03-06 14:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3f0ffb4b7b81678ffe90b708e0ead82 SHA-1: 5f9f6734e313ba6c4b6f6623edcd287e35c5b965 SHA-256: 50a7c39841bf8b4ab6ab8118bfdf1e81c474624d0e4bf987af356de0859b9242
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to English verb conjugations, aiming to trick users into visiting the malicious URL.

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://golowaki.ru/strik?utm_term=verbos+en+ingles+en+todos+los+tiempos+con+significado+y+pronunciacion PDF link annotation
    • http://chestlune.online/best_soccer_coaching_near_me1t2rf.pdfIn PDF document text
    • https://mogiwojijefinan.weebly.com/uploads/1/3/4/9/134900510/f47d9b8f2.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/dbx_160x_review.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/naseterezo.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/rajewuwomukake.pdfIn PDF document text
    • http://info-pages.ru/17368986445z1mqh.pdfIn PDF document text
    • http://ek-arenda.ru/25190972358l8dwo.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/feremezeluve.pdfIn PDF document text
    • http://islta.fun/bepuganurisajepitosumola0cywn.pdfIn PDF document text
    • http://qwertyujg.xyz/8865913100359wgy.pdfIn PDF document text
    • https://fapufeloku.weebly.com/uploads/1/3/1/0/131071019/4547792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/types_of_animals_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/la_casa_de_bernarda_alba_personajes_pepe_el_romano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62127232-2446-49da-8c93-1fd00811aa74/lg_v20_battery_draining_too_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4004f5f-ba17-4dd4-b639-ce05f1aa54e2/japuzesobinifojivozeniwu.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/mn_drivers_license_veteran_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1cc979-eb47-462f-8467-48f5dd24b335/ver_el_principito_pelicula_completa_en_espaol_latino_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/bal_ganesh_information_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/94300959669.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/ibm_blockchain_platform_enterprise_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50be7de2-ca55-4b52-a972-ef7ae9535862/what_is_esl_placement_test.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_off0000f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 5684 bytes
SHA-256: 18d5484b03aeed8d77d2cbde18d277717a0e2b07f65409f5eb3fea26e5516570
font_01_sfnt_off00010468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10468 14080 bytes
SHA-256: 4459f8ef1160c7ea9d0e572af051bbf470c9088beec42208f67c1abfe6179481

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