Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ae143430491daa…

MALICIOUS

PDF

74.8 KB Created: 2021-06-01 04:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f50c0df8d891af75eb23ca87b12349cc SHA-1: 349eef69a2dbfef52b8de9096796b630b1ab27a7 SHA-256: 87ae143430491daa5e54ad02ba32bc4e34d78a66e9af65155f877f833be4bdf4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate search results for technical documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/pbw?utm_term=matlab+for+engineers+5th+edition+pdf+moore
    • https://mipadabu.weebly.com/uploads/1/3/4/7/134751654/9936545.pdf
    • https://toviladul.weebly.com/uploads/1/3/0/7/130776498/xebumawas-satope.pdf
    • https://jopegivev.weebly.com/uploads/1/3/4/2/134234712/pipeg-gogifag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/370ccc60-e853-40ef-9361-90aea14ff0b3/la_tortuga_roja_pelicula_completa_en_espaol_latino.pdf
    • https://uploads.strikinglycdn.com/files/ffd6f36a-9a2c-4cfa-bcbe-4773f30d97bc/futoravajuvo.pdf
    • https://uploads.strikinglycdn.com/files/b974b3e8-7207-4efa-b5db-df47b2390618/lost_in_you_sea_lyrics.pdf
    • http://mikabipi.pbworks.com/f/ditojusabumud.pdf
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144423951/lofuneko.pdf
    • http://wusagem.pbworks.com/f/android_version_for_samsung_tab_3.pdf
    • https://uploads.strikinglycdn.com/files/ddd23afd-2c2c-4cdd-a1b9-af440bc22b58/27698138397.pdf
    • https://uploads.strikinglycdn.com/files/dde202c9-d0d8-439f-80f1-3e0a98325ec8/wutopusexodokop.pdf
    • http://wiwedano.pbworks.com/f/sepujoxedazaferurituwogov.pdf
    • http://paderukut.pbworks.com/w/file/fetch/144438141/86558619456.pdf
    • https://uploads.strikinglycdn.com/files/8ee02d80-feee-4a59-a38f-09bbe85c7075/how_to_write_a_bill_of_sale_for_a_boat_and_trailer.pdf
    • https://uploads.strikinglycdn.com/files/20d7cef6-aba6-4554-bc9b-7539221a4f37/nutilexumegamut.pdf
    • https://uploads.strikinglycdn.com/files/60828d1a-ed98-47b9-b4dc-3b9c95725d77/como_construir_paneles_solares_caseros.pdf
    • https://uploads.strikinglycdn.com/files/b0b83610-045c-459a-9d19-bea05d60a806/roku_3810r_airplay.pdf
    • http://wuranosa.pbworks.com/f/toro_ss5000_drive_belt_routing.pdf
    • http://xuruzinijub.pbworks.com/f/baudrillard_simulacra_and_simulation_disneyland.pdf
    • http://tubekikewabi.pbworks.com/f/1773150487.pdf
    • https://uploads.strikinglycdn.com/files/3304c579-a504-4376-b483-e69102b40719/nomomijesila.pdf
    • https://uploads.strikinglycdn.com/files/8ffe01ba-3e27-4411-8d5b-45bc831a04ec/solution_techniques_for_elementary_partial_differential_equations_third_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e1.bin
b993238324ecb2409d54e6d99c11a4bb13268f95e6bdaa9a38a42c433d640a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 5724 bytes
font_01_sfnt_off0000f438.bin
54469dcfc15a8da6df18587a653f4b851b644c485dae7169122d1f4b63d47e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 11668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.