Malicious PDF — malware analysis report

Static analysis result for SHA-256 1801c015da16c226…

MALICIOUS

PDF

75.3 KB Created: 2021-02-22 08:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0270bb895ea0f19ed83881818aae69ff SHA-1: 413e79e93b357aa83bb704eb2cf65fdc028e8a34 SHA-256: 1801c015da16c226609e3b22e0548674ac5c054c9c37e629a092e8a7eb9c167e
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically linking to a download lure for 'Adobe Premiere Pro CC 2015'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature, likely involving a phishing attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+premiere+pro+cc+2015+download+windows+7
    • https://cdn-cms.f-static.net/uploads/4459188/normal_600bfa9d32166.pdf
    • https://cdn.sqhk.co/fedovusig/ghLgNG0/magic_fluids_free_online.pdf
    • http://vixixar.22web.org/bufoferivito.pdf
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fca53d3da04c.pdf
    • https://cdn-cms.f-static.net/uploads/4481828/normal_5fd9c8776b537.pdf
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5ffc2ed257f6c.pdf
    • http://reduslimitalia-official.website/fluid_mechanics_frank_white_7th_edition_solution_manualdpgjv.pdf
    • https://cdn.sqhk.co/gujuvizaja/iGCU6jf/fruit_mania_fairfield.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lowebemuwojiso/manualidades_para_hacer_y_vender_en_navidad.pdf
    • http://kagowuv.epizy.com/debt_items_on_balance_sheet.pdf
    • http://mowuxixujovaxe.rf.gd/namofi.pdf
    • http://daduzafez.epizy.com/19386347865.pdf
    • http://kevatudoritek.rf.gd/apache_commons_codec_jar.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_off0000e480.bin
1c9161ee890480cdf009fd6601e4f8450d10d3fb0ca1b95a895f86a9f21230ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 5968 bytes
font_01_sfnt_off0000f8d1.bin
ec13a45af40d36e0371223d3b3bb663b052cd66a6aafd17389222830878993c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 10920 bytes

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