Malicious PDF — malware analysis report

Static analysis result for SHA-256 e634fc3a7cbcc79b…

MALICIOUS

PDF

70.8 KB Created: 2021-02-19 15:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1524a9588045ccea0e8785b6b273d216 SHA-1: 1ba0c2fd23edcaee047ae1ca901a331a2221e6ad SHA-256: e634fc3a7cbcc79b1a9ffb2764ed865a59417861bd85519beb0680e2698c9f9a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farming, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest the document is designed to redirect the user to a malicious site, likely for further exploitation.

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://jottigo.ru/wix?keyword=planners+2019+to+2020+walmart PDF link annotation
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/tuvena.pdfIn PDF document text
    • http://lnstagramverifycentre.com/denurumalzwr0.pdfIn PDF document text
    • http://teaapple.space/jiworixikid0aqny.pdfIn PDF document text
    • http://magnetfix.store/bomb_it_up_app_for_ios6rv9u.pdfIn PDF document text
    • http://antonioit.space/gakerefakufuwupoda8hshh.pdfIn PDF document text
    • http://strahauto.website/58335727260s87up.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/4525252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_6022333b4cee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384159/normal_5fc7c92cb45df.pdfIn PDF document text
    • https://gevamimukeruku.weebly.com/uploads/1/3/4/6/134656740/50b6439.pdfIn PDF document text
    • http://wowitaly.pro/internet_download_manager_keygen_generatorno655.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/zovokudin.pdfIn PDF document text
    • http://roman-holidays.shop/instagram_influencer_collaboration_templatezkvyd.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/moduxanakuri/fiponajikopilu.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/vinaphone_plus_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/43103580055.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_off0000d70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70B 5408 bytes
SHA-256: 808f5ec4d2477c98f8d9bcbbd367bed33d556a00e113bcfea43239284add80ad
font_01_sfnt_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 10624 bytes
SHA-256: 50bab25d8689ce3a172844b6b5b91611891dea4ac57294d4d4f51ad4b324f64d

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