Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6228310172d7427…

MALICIOUS

PDF

104.4 KB Created: 2021-03-14 00:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5e338c7f7f811491c6ff35c8a445f746 SHA-1: da1717f8c9f6ae10a68181e1244f30ccdf5c9232 SHA-256: b6228310172d74270036b85159ba4f2e9d76c4a12d9e7edd4a5727b9768361a9
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary malicious URL identified is 'https://pelibifir.ru/award?keyword=astor+piazzolla+guitar+pdf', which is likely used to redirect users to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=astor+piazzolla+guitar+pdf PDF link annotation
    • https://cdn.sqhk.co/dedatemaran/hgjFhe7/super_adventure_club_marlocks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_60149fd5b368e.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/fzUgggi/jovejulikiweseg.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/jchdjh1/discord_mee6_auto_level_up_bot_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485570/normal_5fcf145adf522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_602af63d6e3f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_60053c8d58ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_604ba6682df2b.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/hfidhc2/43665793795.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/djjsCko/music_maker_free_online_no_signup_no_download.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/xefezesebusu/base_plate_design_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/what_is_the_mac_version_of_microsoft_project_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/nezimip.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/camera_raw_9._1_full_crack.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_1c58891874a144228b48ee2a1cf4db8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/statistics_of_type_1_diabetes_in_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/oecd_glp_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/44178048719.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/m_a_due_diligence_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/bcr_full_form_in_medical.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/cape_may_county_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/dmlt_biochemistry_books_free.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_803b804670cb4c5db3252897d48d6b54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazutun/frozen_2_trailer_soundtrack.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_off00015954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15954 5248 bytes
SHA-256: d59a3edb8698732bc07417808108dfd229bf252b6433c897962a5db5eded9cbd
font_01_sfnt_off00016b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B48 12972 bytes
SHA-256: d13d052d690f49faced49558442906cac65df76a2ee67604a33596c37a9df026

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