Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01156a7f3cf4a97…

MALICIOUS

PDF

81.5 KB Created: 2021-03-17 02:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 93cf4686fbca3ae52f42213539b95cf5 SHA-1: 5467168f5274d851255426aa92d68cfc58b132f2 SHA-256: e01156a7f3cf4a9793c28cc89055d7899727cfbdf8983d634516ff629bc98413
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 0.9997

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://jottigo.ru/award?keyword=pensar+la+arquitectura+peter+zumthor+pdf PDF link annotation
    • http://gavojutopubiri.getenjoyment.net/75581275761.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/fixajumabafa.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/giaGYib/khmer_calendar_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/egdhhgj/constitution_usa_created_equal_worksheet_answers.pdfIn PDF document text
    • http://dololebajug.scienceontheweb.net/abordagem_contingencial.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/zamafik.pdfIn PDF document text
    • http://govovimifakine.mywebcommunity.org/86475626465.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/how_to_use_combat_knife_resident_evil_2.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/5476185694.pdfIn PDF document text
    • https://zavowije.weebly.com/uploads/1/3/2/6/132680855/vasulo-kiwovedi.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/faxozexurados.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/dead_letter_queue_in_mq.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/around_the_world_in_80_days_macmillan.pdfIn PDF document text
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/zijikitolede_sabujudabofune_bimuf_wokixudamojetet.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/masifilevukobepitusovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4373a976-0ae6-4d17-8827-6053eb6aca28/sejekonemegiwewulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b29919-7965-45af-aa98-26883eb0b05a/nordictrack_c1800_treadmill_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcc075d-9850-4233-9b98-53bae43d40a1/o_que_fazer_quando_ele_vem_aqui_letra.pdfIn PDF document text
    • http://nununad.myartsonline.com/caracteristicas_del_clasicismo_literario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91f5842-5a21-4e17-b8d2-2290e53bf621/shadowscapes_tarot_book_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 5572 bytes
SHA-256: a7a065c5f68a063c5a23b85e88bbec73be5f3b24d56cb6a82579c0531c65d4ea
font_01_sfnt_off0000f8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 12372 bytes
SHA-256: 05fff6c2ea1ff0b4948010ca7b28f0b8380f4129d7d00cd42eef91979f767f2a
font_02_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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