Malicious PDF — malware analysis report

Static analysis result for SHA-256 e716bfe49afcaa43…

MALICIOUS

PDF

74.9 KB Created: 2021-04-12 16:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d155c2b9d695847d6361d01fd519e1c SHA-1: bec5f37bb034df52efba3e33452ec6888f5f7251 SHA-256: e716bfe49afcaa4324254d7476111523f065b17dd348ec44f91ac509993b89b5
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, appears to be a lure related to 'Garmin montana 650 battery life', likely designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/strik?utm_term=garmin+montana+650+battery+life
    • http://vexezujuzas.scienceontheweb.net/89717447574.pdf
    • http://lorezagosuvese.scienceontheweb.net/auto_repair_and_maintenance.pdf
    • https://static.s123-cdn-static.com/uploads/4485435/normal_5fec936eb94dc.pdf
    • http://gapagal.mywebcommunity.org/reglage_carburateur_voiture.pdf
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcb6539bf36f.pdf
    • http://bettyloustintruckbbq.com/google_maps_html_code_generatoremwzd.pdf
    • https://cdn-cms.f-static.net/uploads/4490256/normal_600fb2470c4c0.pdf
    • http://1fps.ru/2012_honda_civic_codeswlkfs.pdf
    • https://cdn-cms.f-static.net/uploads/4488809/normal_604d2a845753e.pdf
    • https://cdn-cms.f-static.net/uploads/4410459/normal_605140e28e18a.pdf
    • http://demuxum.getenjoyment.net/85627321521.pdf
    • https://cdn-cms.f-static.net/uploads/4471691/normal_604aeac3d2619.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_477c400e15a0440e92b857bf2f168101.pdf?index=true
    • http://visevagopar.onlinewebshop.net/ejemplo_de_una_acta_constitutiva_de_una_empresa.pdf
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_af4d3b993a97475db60a2ae6d55d3712.pdf?index=true
    • http://movasedumanepe.onlinewebshop.net/venogotoxewozu.pdf
    • http://xejobutek.onlinewebshop.net/53857435541.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_off0000e453.bin
09bd91159076b3f5cf3113af16964f8c42fc92305a29002502d069dbaa3dccdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 5428 bytes
font_01_sfnt_off0000f6bf.bin
fcc9868333e2fe6a23aa21257b87fcc5ccbe84540166ef6760675be5272febc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BF 11172 bytes

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