Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27e987ab8c04b86…

MALICIOUS

PDF

85.0 KB Created: 2021-02-17 17:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e2fbb29e3d2e50cee9c0178d28e9c902 SHA-1: c4fe7832bb5c1eb30f9f843094d34c087406aea0 SHA-256: d27e987ab8c04b86bdb8303f2fb585d722f3bca1b83bbc79ef228a7197ca993c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be a keyword-based redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://druttle.ru/wb?keyword=zero%20limits%20joe%20vitale%20pdf%20italiano%20free%20download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473403/normal_5fe7a11256980.pdfIn PDF document text
    • https://maverutorolo.weebly.com/uploads/1/3/5/3/135393183/2825192.pdfIn PDF document text
    • http://service-hire.com/concave_and_convex_mirror_calculations_worksheetbzbu4.pdfIn PDF document text
    • http://formverifiedbadge.com/95426548123epgp.pdfIn PDF document text
    • https://bigufoxorifef.weebly.com/uploads/1/3/1/8/131871864/bimiwibiwo.pdfIn PDF document text
    • https://towodoruzaxigol.weebly.com/uploads/1/3/6/0/136050186/5173145.pdfIn PDF document text
    • http://liketime.online/524332268572fi9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_6009c0e5b8bcb.pdfIn PDF document text
    • http://menbp.online/lynch_syndrome_screening_guidelinesisiy4.pdfIn PDF document text
    • http://top-salez.site/96731899744umte9.pdfIn PDF document text
    • http://espacecmb.xyz/christmas_blast_match_3_games_freeuf5it.pdfIn PDF document text
    • http://losinglotterynumbers.com/merurifekenijrqbg.pdfIn PDF document text
    • http://tronreserve.online/80346277351x8j7e.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/latuvo_vigevofu_runuroz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_600b67008b011.pdfIn PDF document text
    • http://idealicait.website/how_to_reset_eotech_51217vq3.pdfIn PDF document text
    • http://zelopaqq.xyz/ver_aliados_online_latino6kx98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_60231452307a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 5372 bytes
SHA-256: 7b193e80e18744277e68bc71ad542f56440462b89eccc77fdc7929a984626af7
font_01_sfnt_off00010f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8F 25164 bytes
SHA-256: 3bc396db3ef1cfe058e2353a6735edb350c80bc3bfdd4db4b59297b780da828f

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