Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1b0dda879dbcc6…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 13:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 974c74f992066414b8740fe3ab81759a SHA-1: 998f5ba1e7a836957464c8235661a3c3672b9b3b SHA-256: 6e1b0dda879dbcc6a80b9c9f5d2e7ee3e8f74cac9048380ff04f5247575eb4cb
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly support a malicious intent to redirect users to potentially harmful sites.

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://jottigo.ru/strik?utm_term=bright+line+eating+meal+plans PDF link annotation
    • http://taxevidel.medianewsonline.com/54926292858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498324/normal_60438a5889d45.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/biaZiia/kufixibitapabovenoso.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/UgijThb/pinata_hunter_2_cool_math_games.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/gDjajaU/tokpromoter_followers_and_likes_for_free_online.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/sorep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5fdb793764205.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/dicfhgu/zowelutawivazuzagelikij.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/xMjflig/sabijutuwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tisezalave/ia0oicC/lurarakazopawakudopewolul.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/iaagfyj/domeminosivorejozux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_6010680ab46a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furosusuz.epizy.com/juggernaut_powerlifting_hypertrophy_template.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/aaj_tak_live_app_free.pdfIn PDF document text
    • http://puzejiruniri.rf.gd/husqvarna_315x_installation_guide.pdfIn PDF document text
    • http://zekuvosaletum.rf.gd/71852939631.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/mathematics_in_nature_project.pdfIn PDF document text
    • http://popupigewomuri.rf.gd/video_trimmer_app_for_android.pdfIn PDF document text
    • http://bujuxuvumelijet.epizy.com/pobixumexikalavalobibale.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_off0000f171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 5284 bytes
SHA-256: 9779a62d63df8704dc3f5eeb472cb4efa970fcfb33fedf257f0b1e0abff35702
font_01_sfnt_off0001033e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033E 11256 bytes
SHA-256: 3e5f74fe98d93acad6e6fd49190e5840839dad0c4dc96f36c9a37b2a42319c4f

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