Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c26a524217f2ce0…

MALICIOUS

PDF

77.3 KB Created: 2021-06-06 21:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6ea5e94cf25f7d60b59cc6c6832899ec SHA-1: f06c9550bd0333716c4590d41fdf235cbfc42f1c SHA-256: 3c26a524217f2ce00bfd3f63db006ce8065df4c7cde86b95362384487a04ce8f
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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://medvor.ru/pbw?utm_term=orhan+%25C3%25B6zt%25C3%25BCrk+ruh+sa%25C4%259Fl%25C4%25B1%25C4%259F%25C4%25B1+ve+bozukluklar%25C4%25B1+13+bask%25C4%25B1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5fd86d47c8342.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4457311/normal_60b6d4c77ab42.pdfIn PDF document text
    • https://panibatolabixoz.weebly.com/uploads/1/3/4/7/134720971/628171298d6a88.pdfIn PDF document text
    • https://noxibeguw.weebly.com/uploads/1/3/5/2/135295894/rixamusiporomo_rekejorikoj_dakikomugumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_6042f7a16d00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_600b733d8ea12.pdfIn PDF document text
    • https://jupifezugaj.weebly.com/uploads/1/3/0/7/130739886/df98e47ab.pdfIn PDF document text
    • https://napujokid.weebly.com/uploads/1/3/5/3/135339673/1306933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_5fd8690fb5cd9.pdfIn PDF document text
    • https://xuxizubewida.weebly.com/uploads/1/3/4/5/134505251/2298623.pdfIn PDF document text
    • https://vizejuvevu.weebly.com/uploads/1/3/2/6/132681979/pizonumabegiwuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405644/normal_5fcda0749042d.pdfIn PDF document text
    • https://bimebupeku.weebly.com/uploads/1/3/4/7/134715010/2325070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_6038930f22bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_606c41728bf40.pdfIn PDF document text
    • https://wirolarem.weebly.com/uploads/1/3/1/6/131636642/5682a81c55a14f0.pdfIn PDF document text
    • https://gudogojowum.weebly.com/uploads/1/3/4/3/134366215/fa6b768394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_5fcf43653b368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memofemovo.pbworks.com/w/file/fetch/144674199/how_much_gb_is_minecraft_java_on_pc.pdfIn PDF document text
    • http://gatunam.pbworks.com/w/file/fetch/144576372/shri_manache_shlok_in_marathi_download.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/numration_les_nombres_jusqu_999_ce1.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144460845/55482434933.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/pagorelafez.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_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 6208 bytes
SHA-256: d5fb5f6f37e663f49101171a78db0a417b7529c01c651dda0ef6993cd6427c3d
font_01_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 12720 bytes
SHA-256: 41361952c8a8283618be8f98ccd9fdcca4193e3fa04c63b89b0e220b4024931a

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