Malicious PDF — malware analysis report

Static analysis result for SHA-256 305b0bde7bfc465b…

MALICIOUS

PDF

80.4 KB Created: 2021-03-16 08:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23c4a09fb4529f7f01865492418546d0 SHA-1: 94ff16b9b3cc8ede69399326f04244dfd7ab1855 SHA-256: 305b0bde7bfc465b65c8763c2096b242439f278ddc4f23e5ac6e52d8b544e2dc
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-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://leonvi.ru/strik?utm_term=electrical+symbols+construction+drawings PDF link annotation
    • http://usmileofficial.site/beneath_the_skin_movie6mpxq.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/Rih0Sij/garudis.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/iIjigi7/gantt_chart_template_12_month.pdfIn PDF document text
    • http://ogranicbio.fun/the_little_prince_book_by_antoine_dexi8nf.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/iuFa9jc/fozudevakidetekadusuwovi.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/kIjhRgj/lep_s_world_2_14-_8.pdfIn PDF document text
    • https://cdn.sqhk.co/lajagika/ahdGSih/sweet_polly_petals_book.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/jkEgfuM/bodevimivulogogomapuw.pdfIn PDF document text
    • http://kedisuli.iblogger.org/autobiography_format_for_college.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/dQVgfii/this_means_war_soundtrack_song_list.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/2637d141-ab49-4796-8e9a-b8bf3955639e/pinoy_tv_channel_teleserye_replay_wow_telebyuwers.pdfIn PDF document text
    • http://ridupokibi.epizy.com/font_ostrich_sans_bold.pdfIn PDF document text
    • http://vovajixavago.epizy.com/ludonemevizevukum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2340a68-bc6c-49d8-8c18-0b7a99d1849d/82508596484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f4ddae-b100-4591-908f-b415ba4e28df/marbury_v_madison_case_brief_summary.pdfIn PDF document text
    • http://jawigunomuj.epizy.com/vizio_smooth_motion_120hz_remote_app.pdfIn PDF document text
    • http://lavavoju.rf.gd/citizen_mens_titanium_eco-drive_radio_controlled_watch_-_cb0140-58e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0d196f-0a3e-4227-9d68-95ac3a251b98/what_are_goosebumps_books_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350b06de-e9f9-424e-8f9a-8fda25e7c143/formulacin_y_evaluacin_de_proyectos_cordoba.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/refiwabelaxinabunubasolu.pdfIn PDF document text
    • http://dinixebun.epizy.com/john_deere_345_excavator.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_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 5548 bytes
SHA-256: f1a34d5593b06e3df120780c5d6a46f1dfb73e123b942067e7d08cae8b54da81
font_01_sfnt_off00010e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 11276 bytes
SHA-256: 5db3d21db1dc54cb3e8dd6006f5fe21b188acd4a1b37b4c29f74c1c2132270bd

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