Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e03c85b430f9b85…

MALICIOUS

PDF

75.0 KB Created: 2021-02-18 23:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 57093e8fb8f8756940d92d648b971f7c SHA-1: 1c6b60350bf51aa82c14b2dba749d3bc1602d57f SHA-256: 8e03c85b430f9b8596c0745b970a3399d91008e5c44335fac61e93a9193c13f0
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users to potentially harmful content.

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://druttle.ru/aws?utm_term=which+snark+tuner+is+best PDF link annotation
    • https://voresefum.weebly.com/uploads/1/3/0/8/130813922/borezikerazoki_suwufifid_lukojit_monojukixape.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/AVjdjjP/lubojizim.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/2904227182f6d7.pdfIn PDF document text
    • https://cdn.sqhk.co/didozakir/hhhijCA/lasofuxagilavilariketi.pdfIn PDF document text
    • http://dkmz1.club/libro_de_marketing_digital_grati6xk79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490365/normal_6024ed9307cfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5ff46444c11a6.pdfIn PDF document text
    • http://greenbike.shop/29920124854oillg.pdfIn PDF document text
    • http://remontvorot24.com/all_gun_sounds_app107ag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fdc36f930e3a.pdfIn PDF document text
    • http://ru-en.xyz/50831337714ly9gf.pdfIn PDF document text
    • http://huseyincanx.com/wafikisevawuv62az.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5fe5471b17a97.pdfIn PDF document text
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/185ca8619bb835.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/UiahhdE/mebujiduniworobadime.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/RUKhgiZ/disco_zoom_background_video.pdfIn PDF document text
    • http://pedrons.space/tonavijodikalofubumus5vkh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA29 5072 bytes
SHA-256: 0f1d7d88a331004e9e8503cb5b73889de3c02cf46123f74454987a4ba2093ccb
font_01_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 10388 bytes
SHA-256: 0329e89e05f283bfd614a19b38fe58811b1e1e9f6c8cc552f445248a01fcfe8d

Open this report in the interactive analyzer, or submit your own file for analysis.