Malicious PDF — malware analysis report

Static analysis result for SHA-256 915e34b4f212fee7…

MALICIOUS

PDF

106.2 KB Created: 2021-03-22 07:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7086dfd879bf0c6f710b93372bd2cfb6 SHA-1: 5c23394c5177f9e39e09f5420262c1f7ab6e6b73 SHA-256: 915e34b4f212fee7ff839fbc9103392a9dbfab1f8491ce5a38d47de8c2b190cf
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 0.9997

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=decameron+boccaccio+pdf+espa%25C3%25B1ol PDF link annotation
    • http://ziwusis.getenjoyment.net/what_is_the_wps_button_on_my_xfinity_modem.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/al_quran_recitation_mp3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zeburozupax/hgcgiHj/vikings_season_3_episode_6_imdb.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/estructura_narrativa_de_los_textos_literarios.pdfIn PDF document text
    • http://mutomew.22web.org/2427070942.pdfIn PDF document text
    • https://sokevabo.weebly.com/uploads/1/3/4/6/134665749/d6ac3f3898.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/what_is_the_theme_of_first_they_came.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/gikalexoguwojefun.pdfIn PDF document text
    • https://tinedejoditof.weebly.com/uploads/1/3/5/9/135971312/nimapuxotijitez.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/arctic_king_8_000_btu_portable_air_conditioner_reviews.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/xibukidamijasolen.pdfIn PDF document text
    • https://cdn.sqhk.co/nujusowidom/viiijbd/wikilede.pdfIn PDF document text
    • https://foxaxefaga.weebly.com/uploads/1/3/1/3/131398491/nuropaneji_powijide_puridof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedejuleler.epizy.com/crystal_heart_guide_celeste.pdfIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_fb7af18b0d8e4959811bf67ab7c3c1e3.pdf?index=trueIn PDF document text
    • http://rodexiguv.onlinewebshop.net/livros_sobre_pesquisa_bibliogrfica.pdfIn PDF document text
    • http://neketepa.myartsonline.com/free_toefl_reading_passages.pdfIn PDF document text
    • http://tavagebobuzopin.epizy.com/63780387590.pdfIn PDF document text
    • http://joluvuworizuv.rf.gd/advanced_excel_course_syllabus.pdfIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_615b8148ee794c26b433458829e4e606.pdf?index=trueIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_19e12641ea0e497ea8a94ed8c13f2c16.pdf?index=trueIn PDF document text
    • http://vifidumefitur.atwebpages.com/59136668113.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_off0001541f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1541F 5652 bytes
SHA-256: d22757b035ce31572bd5889389c32fec39e0aea3b027e59e1af981607049f608
font_01_sfnt_off000166fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166FD 16868 bytes
SHA-256: 156aaf1d24b3514555450970a73a1c21ba1a5f936adf68663cfc61350108c471

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