Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b19a7389eb2d005…

MALICIOUS

PDF

68.9 KB Created: 2021-04-27 05:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d2251ad8056217d82913a6667d8dde4c SHA-1: 100dd6a95595c00bcaf0f30d44471594cfdf62fb SHA-256: 7b19a7389eb2d005f637f4aa608ef1d829ccebe91674463530985857a20b4de8
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 0.9998

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://leonvi.ru/strik?utm_term=geometria+analitica+de+figueroa+pdf+para+descargar+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490263/normal_6039ecb2d1e1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5ffb043bbcf29.pdfIn PDF document text
    • http://juponuziwotaga.mywebcommunity.org/92356032077.pdfIn PDF document text
    • http://namedaun.fun/21280012392pvvcl.pdfIn PDF document text
    • http://zathkatow.xyz/suunto_ambit2_sapphire_hr_gpsc37e1.pdfIn PDF document text
    • http://radanews.site/walking_disaster_sum_41_letra_traducidaii4wm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_60465918827a0.pdfIn PDF document text
    • http://medway24.com/muvisagenolojgitc.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/7jbwhjK/83650694307.pdfIn PDF document text
    • http://winclean-shop.space/how_to_finance_a_house_flip_canadavceml.pdfIn PDF document text
    • http://kvadro63.ru/36466920048crnca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450747/normal_606822702fc4e.pdfIn PDF document text
    • http://about-central.com/92841247492rbbwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_6040a6bcc19e5.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/hdhiqge/super_mario_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/nJXiagj/battery_twinkle_lights_with_timer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopolug.myartsonline.com/diario_de_una_motocicleta_pelicula_completa_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbcae15-510f-459f-9801-805e2365cedf/36222781239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b915149-9dbe-49e0-b0fe-05b500fe9eb0/30736674662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1274d7d-1b11-47ef-978b-3fc53480217e/powidisijewitaxufik.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_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5508 bytes
SHA-256: f8612653365dfed717de2e30fc7f50e127ec9ae7c6e06961e39774bce495b17b
font_01_sfnt_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 10832 bytes
SHA-256: e6cd7008028f9f1e714f45708da57211d3e875cd2f371bf14005673807284aa2

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