Malicious PDF — malware analysis report

Static analysis result for SHA-256 060545da978bd054…

MALICIOUS

PDF

86.6 KB Created: 2021-04-04 06:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7dfb1c9565cb424b78fd9b26b57438b1 SHA-1: 1398aab6c1f64c334feb6b1418dc4e6768ffaf0b SHA-256: 060545da978bd05464ab485f069abec6a6cfe553b0fe267dadba3294e5c48722
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-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://kuzutuzo.ru/strik?utm_term=is+it+ok+to+eat+brown+rice+on+a+diet PDF link annotation
    • http://kilijosizujowo.medianewsonline.com/xujol.pdfIn PDF document text
    • http://reawolt.online/can_i_replace_the_battery_in_my_garmin_watch4ere5.pdfIn PDF document text
    • https://cdn.sqhk.co/mutobudenit/hhwja5z/zombie_vs_ninja_1989.pdfIn PDF document text
    • http://7lessons.website/airplane_games_for_windows_76lwpt.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/atlas_anatomie_humaine_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/gigVd3I/dovomotu.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/ihlhdha/16102509407.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/world_map_offline_exeq54us.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/96655897426.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/mapa_metro_barcelona_2020.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/how_to_connect_turtle_beach_stealth_600_gen_2_to_xbox_one.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/venice_tourist_attractions_map.pdfIn PDF document text
    • http://joy-todays.online/26872086152lmqnr.pdfIn PDF document text
    • http://mgacessoria.online/how_to_adjust_fan_speed_on_a_furnace53nf6.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/XWdicij/mighty_battles_download.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
    • http://zibelasavu.atwebpages.com/livro_administrao_estratgica_planejamento_e_implantao_de_estratgias.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/4591721482.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_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 4924 bytes
SHA-256: 9977114586a4201a0ad83653ab4fb02feabd2b3b66100b9ca28ad2136ddb6900
font_01_sfnt_off00011642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11642 11992 bytes
SHA-256: b2419e5335db460a49883e194c26488bcab736a69f38bd0b093dc0b4f0dad6a0
font_02_sfnt_off00013ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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