Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae789bad8252a890…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 09:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 26eef22b4b7a5195dda5319941c2a0cb SHA-1: 48395a23d6234d58a2bab4760bd528cd4e7b52d1 SHA-256: ae789bad8252a89093944f3941275ba9b15d0a21a5c6e350caf255d5b2af4d8e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/aws?utm_term=why+mercutio+and+tybalt+fight PDF link annotation
    • http://latencfsrt.space/icloud_bypass_tool_ios_11._46hd33.pdfIn PDF document text
    • http://strahuemsya.info/solar_panel_study5foxe.pdfIn PDF document text
    • http://stavki-na-sport.site/20408917591c4zkn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_603181dcbfa4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_60354c4b532b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5fdd325fdd5b0.pdfIn PDF document text
    • http://labiosdewonda.com/childrens_illustrated_dictionary7bqmc.pdfIn PDF document text
    • http://dommasters.site/puzesejilutejubqg589.pdfIn PDF document text
    • http://vienvozvrat.site/did_pixar_make_frozen_2u4npb.pdfIn PDF document text
    • http://qlemelest.online/how_to_use_scratch_appchte0.pdfIn PDF document text
    • http://mixed-rootwork.com/inflorescencia_del_maizx2jjv.pdfIn PDF document text
    • http://limecash.xyz/baixar_manual_de_especialidades_desbravadoreso8f60.pdfIn PDF document text
    • http://santecmb-sarl.com/transit_anna_seghers_buch_zusammenfassung616vc.pdfIn PDF document text
    • http://nicepics.xyz/chrome_web_store_video_er_prohdoby.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490524/normal_5fdef291cdc2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475985/normal_5fce7b0b33bc4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/jogivozi.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/14907561714.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/templates_powerpoint_professional.pdfIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_417f633fc1d5409dba7fbfc90525277d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiniruru/luxapofaruweravopanupi.pdfIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_2642da174e8544628bb2fe7d13bcea02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dumupa/59034773416.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_69caaef1cc814c1190ecd7a266a8c77e.pdf?index=trueIn 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_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 5512 bytes
SHA-256: 6df79f6111afe6bbc2ef2470bbf20945dbbae4be8e6154bd0f81645bb64f288a
font_01_sfnt_off00010e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8D 11324 bytes
SHA-256: 66fa870225d1225164642200fae5394fa75b479e10ae61d9a97f7e02d6e4a009

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