Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b7b7c4b07a5edc…

MALICIOUS

PDF

77.6 KB Created: 2021-03-23 04:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 156e3e8d1298659e6bbed05288d125ad SHA-1: 8ed797bef00bf3e34e634eeef5d78367182f9f8d SHA-256: 53b7b7c4b07a5edcc86b017266c6683bad16c3538118e25d4cb5aecd5a838881
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'botokaw.ru' with a query related to a 'ketosis diet plan pdf', suggesting a lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://botokaw.ru/award?keyword=ketosis+diet+plan+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445733/normal_5fdf8098a7986.pdfIn PDF document text
    • http://woodbonus.net/los_juegos_del_hambre_sinsajo_online_pelisplusrz1kb.pdfIn PDF document text
    • http://fopemotizikaj.iblogger.org/8873014823.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/xivoxokoseku.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/hjjRhfp/defumi.pdfIn PDF document text
    • https://tizonitiwu.weebly.com/uploads/1/3/4/7/134734793/tedak_tofir_tasasenogopumul.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/hhDhfhc/vixiwabuvapufefedarik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_604e5b9a65309.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/ijghhgQ/bloons_td_6_free_download_pc_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_602efc475b94a.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/lasibepupejor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_602e3538cd7d1.pdfIn PDF document text
    • http://tublitalia.fun/cuantos_tipos_de_ecuaciones_cuadraticas_hay_y_cuales_son6y874.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/hjTv7gc/learn_to_play_piano_online_course.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5fe07ba7283ab.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/7178354.pdfIn PDF document text
    • http://vajujikelo.22web.org/sinixeponem.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/CTvMjj0/nolan_arenado_injury.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupikokaguzixag.rf.gd/1996_ford_ranger_xlt_4x4.pdfIn PDF document text
    • http://kugefosames.rf.gd/garmin_78s_manual.pdfIn PDF document text
    • http://zuniguvip.epizy.com/queen_bed_sheets_walmart_canada.pdfIn PDF document text
    • http://jexesomaw.epizy.com/nasogisekezobifumizo.pdfIn PDF document text
    • http://begupegag.epizy.com/1_8_oak_plywood_sheets.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_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 4908 bytes
SHA-256: 7e518effd9c31a484c4633cfd2ae6d86c47964bdd03046f8837c171074ba5f5c
font_01_sfnt_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 10696 bytes
SHA-256: dadf0b9a80dd0e342134a1f68224c4bb0cf7f2a8bcc8b23a2bbbe204d5f6eb4a

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