Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0a80c9217b6d00…

MALICIOUS

PDF

78.9 KB Created: 2021-03-28 20:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b68effa3bc23b0c5e023a985b5a9daa4 SHA-1: 81500d77595f23147466618be4e6da7c41381704 SHA-256: 4c0a80c9217b6d00c28bbcffa87f3eec0387f38ac0ef456c9ed41447d946d832
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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://mezovuduw.ru/strik?utm_term=continuous+tense+worksheet+for+class+5 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5fc752d59c0a2.pdfIn PDF document text
    • http://xajozixav.iblogger.org/cv_template_for_front_office_supervisor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_5fd869f4cbb7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_605900eebc003.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/lixisariwulo/amapiano_dance_2019_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/ketosis_cookbook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a7ddc6-508e-4c10-b512-a42e710599bc/laridakevosota.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/live_football_tv_android.pdfIn PDF document text
    • http://wolumonixor.epizy.com/top_android_app_not_in_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/fumuwemezutegitag.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/daniel_boorstin_the_discoverers.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/conics_worksheet_1_circles_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/tuvenazosajute.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/45511152355.pdfIn PDF document text
    • http://tunawumananedi.rf.gd/carel_ir33_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/ejercicios_de_limites_indeterminados_0_0_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ab6802-a23d-461e-bb5a-bbe4dacac0a2/xixiwif.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/dawobifatugitorabokon.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/how_to_change_to_radians_on_casio_fx-991ex.pdfIn PDF document text
    • http://bizepusozuj.epizy.com/fall_of_reach.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_off0000f5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D8 5152 bytes
SHA-256: 141424e232d6503a945de84de21aeb0d77097d389e03d8c75a7ac9ae355094db
font_01_sfnt_off00010772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10772 10876 bytes
SHA-256: a22a1c8241979c4ff497a685ce7cabc14bfb1984615bcc31867976dfa278e29f

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