Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd68f88a68e734a…

MALICIOUS

PDF

69.9 KB Created: 2021-02-27 06:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ecf80798b82473e87a6828714db286c3 SHA-1: 10a84587bb81c5c2818bc89d9675b14274a8a124 SHA-256: dfd68f88a68e734a52200a116dd7c4a43ef0353d4830a412f28e685d8cae1e0c
134 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic identified it as a link farm designed for SEO manipulation. The presence of a 'download button' lure further suggests a malicious intent to trick users into downloading potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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 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://baarspo.ru/strik?utm_term=fl+studio+mobile+android PDF link annotation
    • http://wiinorama.website/pajapudakipezekaleludoxaizozo.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/topupemudifovetuzarig.pdfIn PDF document text
    • http://hyipinvest.site/fivufumeduralz3g6p.pdfIn PDF document text
    • https://xenewonunawof.weebly.com/uploads/1/3/2/7/132740417/df2fc4dc665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_6028b1c450093.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/vunogogonawezuxowiwa.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/el_hijo_horacio_quiroga_analysis.pdfIn PDF document text
    • http://naturka.space/hatch_download_for_rhinof7g9t.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/67609549052.pdfIn PDF document text
    • http://noksipals.online/how_to_respond_to_form_interrogatoriesvb4wj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_6004826ef2331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_60312fc0d2c43.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/linedokonaven.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugukokoner.myartsonline.com/gomikemufuwusi.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/46615330247.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/metodologia_de_la_investigacion_cuantitativa_segun_autores.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/column_in_excel_sheet.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_off0000d49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49B 5064 bytes
SHA-256: a3e1b5873db050b22134d6cf3a626617713120131146bc031d0f498d052bc166
font_01_sfnt_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 10420 bytes
SHA-256: 3657a3034bf74c288d6a78135e0465b51f62a0098f56c7617913ee835b45cefd

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