Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c553e967a65c641…

MALICIOUS

PDF

67.6 KB Created: 2021-04-01 11:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 38365a051330304416ba83eca871df14 SHA-1: 2ca5364c494b82ba023c8b091ae3d823e5639d2e SHA-256: 7c553e967a65c64108556a87c743358cf0787ca630a85fab438ddb7971ab157e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://ponafet.ru/wix?keyword=nous+finirons+ensemble+streaming+vf+gratuit', are likely used to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/wix?keyword=nous+finirons+ensemble+streaming+vf+gratuit PDF link annotation
    • https://xabetidadema.weebly.com/uploads/1/3/1/3/131398123/xofobidomo-redowugavozetub.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/RAihwja/among_us_lock_screen_live_android.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/doxigijexuv.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/hchhhe7/touge_drift_and_racing_hacked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_60155d0710f97.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/phgiigm/punch_boxing_3d_game_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_60472a3926443.pdfIn PDF document text
    • http://bizifemodefi.mygamesonline.org/dikeregibexoribaxurozipoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_7fb157cc8c424eac9a51e1cf76a727be.pdf?index=trueIn PDF document text
    • http://bopewexe.onlinewebshop.net/trilogia_de_la_guerra_agustin_fernandez_mallo.pdfIn PDF document text
    • https://949217f6-ecfc-4a1b-8806-967b2a145102.filesusr.com/ugd/b08fd2_891dc1fdb350406fa489db49cc003482.pdf?index=trueIn PDF document text
    • http://wipibefab.onlinewebshop.net/life_below_stairs.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_15f4955f4f6648b8868d474dd0b0d503.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_83832efac362466aaeb3822a69c94de3.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_8c16cf4e3d7745779269cfb7050bdc07.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_off0000c977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC977 5256 bytes
SHA-256: 3ac58bb76e3cee544ce34eb7d0d05e6eff94fd64e73564433c9fced2dbb92d12
font_01_sfnt_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 11200 bytes
SHA-256: 2a37abcefe98675ebb4fdc85c334b8d253d4e01b24ec5cbb53acbc264196607c

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