Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a70dbf51eab5ea9…

MALICIOUS

PDF

73.4 KB Created: 2021-03-05 02:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6efef6a4f8d9b5916688cd07e3491baf SHA-1: 1965daf619b934e7b35794800ad8ee3594381b70 SHA-256: 3a70dbf51eab5ea98a67baf1aaa235445fb306c3d76ff29695c461d235b8fdd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/strik?utm_term=what+causes+your+washer+not+to+spin PDF link annotation
    • http://loveantravel.xyz/pashto_poetry_books_downloada140d.pdfIn PDF document text
    • http://nosinoski.shop/zenidobutujinvtqhk.pdfIn PDF document text
    • http://shoop-fk.ru/47344411900aucv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420028/normal_5fe1aafc8a5a8.pdfIn PDF document text
    • http://life50it.pro/fosuviloxapaqpwqa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_600529a26e143.pdfIn PDF document text
    • http://noniteziduvi.iblogger.org/1245150260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_60292de0b2889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_5fe5c357efe6f.pdfIn PDF document text
    • http://homebig.space/bexigiviputujesuviwozalij3gfir.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/bejideba/branding_identity_guidelines.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_6c29f5eea0c0404b801ec15a5bc84646.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/web_based_application_architecture.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_6f2f9f5e022740c488cded6591ed69b5.pdf?index=trueIn PDF document text
    • http://jesegusanasukan.epizy.com/libros_para_colorear_gratis_frozen.pdfIn PDF document text
    • http://rixatupafavumub.epizy.com/harry_potter_book_4_illustrated_by_jim_kay.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/maps_minecraft_apk.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_d19b10ac152c41e3bcc72bbc91b2f61e.pdf?index=trueIn PDF document text
    • http://mulozeraxepe.epizy.com/58396350363.pdfIn PDF document text
    • http://galojuxutiwas.epizy.com/attack_on_titan_wallpaper_eren_titan_form.pdfIn PDF document text
    • http://tusagotimus.epizy.com/gokefu.pdfIn PDF document text
    • http://lonozixugixapap.epizy.com/zobubimajefupe.pdfIn PDF document text
    • http://zibemusisuvimal.rf.gd/baithungi_piya_bolero_me_dj_song.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_6e44e1ca40704974a21297fad9ed501b.pdf?index=trueIn PDF document text
    • http://sewasijibakel.epizy.com/tuvefebojax.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_02a9ca6aba3a42f9bf0fbdddd82d69f0.pdf?index=trueIn 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_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5196 bytes
SHA-256: 8b2de354a3e92565b59dba93632ac95fa50dca470485207833f70f675f3a22df
font_01_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 10956 bytes
SHA-256: f4c1d115d847b74196f66f98b4446dc040948f1d89b4b240df8f0231cc2cfe7b

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