Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28ef2e594dc085e…

MALICIOUS

PDF

88.2 KB Created: 2021-04-29 11:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7f6fd3e52593d2855ac24fb9297bb718 SHA-1: 5a460c94754aa6b0d52ab5432172626c64df366c SHA-256: c28ef2e594dc085ed85c2951cda1f767a4ba369428a2eea3abdd58fd2687ac49
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://pelibifir.ru/strik?utm_term=poisson+distribution+example+questions PDF link annotation
    • http://item-mask.top/how_to_workout_chest_with_resistance_bandst6kd7.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/zbiiUpU/mountain_sniper_special_ops_force_majeure.pdfIn PDF document text
    • http://idclick.cash/tetusivokunamudogigapqp0g8.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/gomiwabiwimenadofefowewup1tzkq.pdfIn PDF document text
    • http://presentinsta.online/aua_guidelines_male_urethral_stricture53mrj.pdfIn PDF document text
    • https://cdn.sqhk.co/xezufulozuwo/eiaFhiJ/supegonobudazivajexuseje.pdfIn PDF document text
    • http://czecheducation.space/cazadores_de_sombras_y_subterraneosfxcr0.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/animusic_stick_figures_sheet_musiciql1k.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/b7cchiR/stickman_destroy_ragdoll_destruction_2.pdfIn PDF document text
    • http://instasurprise.online/why_does_my_lawn_mower_shut_off_when_i_engage_the_bladesstiny.pdfIn PDF document text
    • http://tryraisins.club/lafekomojemikegoxusi75h60.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/jccwhdV/chennai_super_kings_players_price_in_ipl_2020.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/jozaponi/81276476398.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/counter_strike_source_admin_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/wodifuzitalogutiga.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/53486203850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8962792-6cce-42dd-ba07-414b44fb5941/hp_deskjet_3050a_j611_scanner_not_working_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17960e70-fcd4-4844-bf7f-4b54c17b0095/34948470048.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_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 5440 bytes
SHA-256: f2d648d8083e5915890f6cfb90211fc17a39f457fdda685a952766dc4d56c8f1
font_01_sfnt_off000129d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D0 12292 bytes
SHA-256: 2bd522c0fddff5740da9b0616b58e282884ebb146b94c2e94ece2136c57690c5

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