Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e03ef9d47544cad…

MALICIOUS

PDF

80.5 KB Created: 2021-03-23 08:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ad2391ec1d1bfd0d2b98a36c554e207a SHA-1: 5323b1e44ef9b3e804141743d8182ec64b4ba8e5 SHA-256: 1e03ef9d47544cadae687fef3c3cf30a58c8e2621db5c02bc5884e0eea883ffd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9964

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=vertx+defiance+jeans+dark+wash PDF link annotation
    • https://cdn.sqhk.co/sepunaro/jrhfaWo/teacher_application_lesson_plans_free.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/hjjjG9E/tedakasudav.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/idheRgc/wojupos.pdfIn PDF document text
    • http://setifol.66ghz.com/fukesamivusije.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/FjbgAmv/fozizoguvu.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/j8hic4f/marketing_strategy_frameworks_to_identify_pockets_of_growth.pdfIn PDF document text
    • https://cdn.sqhk.co/bisozowinala/ggfoibL/when_does_espn_tournament_challenge_start_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/PjbYhir/nevovilutuxovin.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/hhgfjhv/hip_hop_music_artists_90s.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_c80093c96eb048999a8ec688cb8b7de9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/wibolusabaneponekopebafu.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_2c900dc51f954a268867f190868ba4a7.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_db207bbfad3e479ca696e6f5d3a4af1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9231330c-f1b5-4199-8a4b-5600bac573cb/68151373078.pdfIn PDF document text
    • http://bumisalozik.rf.gd/online_travel_agency_project.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/65098489581.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/23206138725.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/lista_de_verbos_en_ingles_y_espaol_irregulares.pdfIn PDF document text
    • http://sidakofonol.epizy.com/canadian_passport_application_child_form.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_8caf3c6dfe4d4fbfa2ef3d7a02ed2961.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_e91dd6f0e3e04212b232d92dfc9cab19.pdf?index=trueIn PDF document text
    • http://vabepevid.epizy.com/33996348286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b542e9-008c-4ad4-8cf5-823a8fd09965/usmc_junior_enlisted_performance_evaluation_system.pdfIn PDF document text
    • http://ridibodivusunob.rf.gd/25607393126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d38a3fb-0a88-49a6-badb-4a6a1cb496c4/1300319133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cbbb66-0db3-485d-8719-71599fa35837/riniwuzilejodesoxixu.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/ozark_trail_750l_rechargeable_flashlight_disassembly.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_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 5340 bytes
SHA-256: c4713d37c322fe05b4b3f15831240251919f2aa8411fd7c0aa31e551b067d731
font_01_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 10564 bytes
SHA-256: bc60ba6ac2a5acc8249cf47ad8e5e3d95df8bb83acb6d72edcfbc22757547662