Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eceecb1a17c5e6a…

MALICIOUS

PDF

82.3 KB Created: 2021-03-27 12:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 409ac542201f6105ae06bc1102eeb9e4 SHA-1: 5e7546a23964600d614690d785c79bc4e80265bd SHA-256: 6eceecb1a17c5e6ac73bb4acee7a19976ed5a08785bf661d5234638ce274ea55
126 Risk Score

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 0.9996

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://fokemale.ru/award?keyword=materialismo+hist%25C3%25B3rico+e+economia+marxista+pdf PDF link annotation
    • https://cdn.sqhk.co/gewanunu/aggDu4i/84078422182.pdfIn PDF document text
    • https://cdn.sqhk.co/nelufebo/eIgcigN/mevixiwobela.pdfIn PDF document text
    • http://xeberok.getenjoyment.net/maria_montessori_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rasadenibe/cNieigy/nuwemen.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/biology_notes_for_class_10_cbse_heredity_and_evolution.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/84715823698.pdfIn PDF document text
    • http://redirerer.medianewsonline.com/functional_job_analysis_sample.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/les_collectivits_locales_au_sngal.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/Kji9dK3/fupusem.pdfIn PDF document text
    • http://fanilobepewe.sportsontheweb.net/makalah_bahaya_merokok_bagi_kesehatan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jakujakula/free_facebook_video_er_app_for_iphone.pdfIn PDF document text
    • http://fizufizobizud.epizy.com/capteur_ultrason.pdfIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_af86aa50817244548f4b2947b51f9bef.pdf?index=trueIn PDF document text
    • http://gepuxaxevo.rf.gd/edit_excel_spreadsheet_on_iphone.pdfIn PDF document text
    • http://wutopow.epizy.com/defoliwesimas.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_795edf50475648569fdcc0e9ff3062cf.pdf?index=trueIn PDF document text
    • http://gezixus.myartsonline.com/86676235653.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/autotelic_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/wemajopuxoronefabumekuro.pdfIn PDF document text
    • http://gavofime.atwebpages.com/84562269382.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/9734765834.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 5392 bytes
SHA-256: 73cfc5c2d73a678f1df867b572d3ed851a33564d3592a09db4e0fad959744471
font_01_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 12220 bytes
SHA-256: ac4f5684e18a80dd6893faabfa652359ccf18d3e9374626a56927887484e8c93
font_02_sfnt_off00012af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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