Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bc65b3d95726a5…

MALICIOUS

PDF

75.9 KB Created: 2021-03-10 09:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a70c32d97fb7765f60ce696f8c51094 SHA-1: 1067f00f181d284e1c3427aeb418ffbd40f8cf29 SHA-256: 03bc65b3d95726a52b011777c8d07ed0208af4c0d5aa4ef7d58a76e8c643a9d0
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=coronary+heart+disease+review+pdf PDF link annotation
    • http://fruitnaturs.space/fixadudawozokofipedolulutf7.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/best_cfop_algorithms.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/ps3_controller_charging_station.pdfIn PDF document text
    • http://bahis-sikayet.com/fanaretoniljzqtg.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/igcjhGX/hideously_meaning_in_urdu.pdfIn PDF document text
    • http://zikevamakag.mygamesonline.org/virekuziwupurujax.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/is_nitro_cold_brew_coffee_bad_for_you.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/fluval_filter_406_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/g17u9hb/lusedegavovanasa.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/robin_hood_prince_of_thieves_movie_online_free.pdfIn PDF document text
    • http://poopo.ru/braun_series_7_parts_canada1uuq5.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/jcihijf/roblox_games_to_play_online.pdfIn PDF document text
    • http://creditpm.com/bebawunirajlqhu.pdfIn PDF document text
    • http://xsale.trade/zeluzlw9lj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_63fb0b26b360436ea21508e252aba5ec.pdf?index=trueIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_7df85896915f43adaddefbccb2467b66.pdf?index=trueIn PDF document text
    • http://belibivizonojo.myartsonline.com/92453918381.pdfIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_79e96b6e698346d88e4f34ef95d69835.pdf?index=trueIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_0111251227b74297ba3a813087d352c6.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_08b61270940b4c4382f18fb7d2d89b23.pdf?index=trueIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_5165d99ee4aa43da84c81c8f877448f1.pdf?index=trueIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_a43e3216ad1f4cd9b0f7ccc24909e9ac.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_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 5256 bytes
SHA-256: e4a36582abe33a6bc724082d5c4532a1abf5f5074a37b90ea8cb3da85e3810a0
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 10580 bytes
SHA-256: 1846938029b15d7c21cf7d80b3c622c700ed71fdc95540bbbf76d5685df7ae76

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