Malicious PDF — malware analysis report

Static analysis result for SHA-256 47215a4f1708dad7…

MALICIOUS

PDF

81.0 KB Created: 2021-02-10 16:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8fff1d7351bf8b6a24baaf336e4bc886 SHA-1: 2098effde64c979b71cbb247dd9a33cc1d4143fa SHA-256: 47215a4f1708dad7937361a92009b0c8b8338ec4c4b6f3e6a5041f0d8b973a22
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript, though not directly executable in this PDF context, suggests a potential for exploitation if the PDF were to be rendered in a vulnerable viewer or if it's part of a larger attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=exit+west+pdf+ita PDF link annotation
    • http://momipusodutiga.22web.org/33939715084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fcd013a1c90d.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/HgcXrjf/nijajebajes.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/4hIgegh/gavar.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/rasekafe.pdfIn PDF document text
    • http://gevixadita.22web.org/76984350243.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/gjhdgij/change_color_in_photoshop_elements.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/MVjh3if/7235639324.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/vihhbje/75326289289.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/gyggjgH/black_friday_sale_online_clothes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizabo/basic_language_commands.pdfIn PDF document text
    • http://dazoxamawix.rf.gd/43476730525.pdfIn PDF document text
    • http://boponewutizubi.rf.gd/33562131589.pdfIn PDF document text
    • http://muvipifipu.rf.gd/lakikelerupiranujefatimur.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/47963561050.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_off0001012e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 5024 bytes
SHA-256: e36560efe6f940e1f476acaae724e8bb90bd8be52246cce33c0b27d54efe59d4
font_01_sfnt_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 10760 bytes
SHA-256: 797eda93b1215ef33b0bdf25b2a628293f3e21aa5e770362c21d6ee55a36fad7

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