Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc6d4c9d88194f6…

MALICIOUS

PDF

72.6 KB Created: 2021-02-18 07:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3c5bb5a6dc089b37318795d171138b33 SHA-1: c82f8dbede0e0e02e422e407276524ae9df9d99a SHA-256: 4bc6d4c9d88194f68d1de0935bd70df43039deb1a494925823012548ea34e131
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. The document body contains a search term 'yardman mower parts nz', suggesting a lure to disguise malicious content. Multiple external URLs are embedded, likely serving as part of a link farm or redirect chain to a malicious payload or phishing site.

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/123?utm_term=yardman+mower+parts+nz PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451941/normal_600e68dc4eb35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5fc6bb80d77a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5fd67579b19c1.pdfIn PDF document text
    • http://zubiki.top/88907162232xgd0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_5ff3fbb222de2.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/hghjaia/11st_in_lbs.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/hcFlGja/19441368995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_5fda3bfd38c74.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/mifolipemafixiso.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/nNjhCje/cruise_ship_wallpaper_oasis_of_the_seas.pdfIn PDF document text
    • https://xaxepilote.weebly.com/uploads/1/3/4/2/134265473/dcb1a.pdfIn PDF document text
    • https://bajusokizuz.weebly.com/uploads/1/3/4/4/134400974/tifasojopo.pdfIn PDF document text
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/a6e7f98b08.pdfIn PDF document text
    • https://bujipivew.weebly.com/uploads/1/3/4/1/134131373/wukuvolagu.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/nowokil/69152125050.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/33538562985.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/koxipodazuvamotosat.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_off0000dcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFD 5176 bytes
SHA-256: 3624dce2442b4dd9caeda9d85af43d40f58041f58e09a155b6887769ba3570c4
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 11296 bytes
SHA-256: 33f82a80295dfc392efc7cf09a50626cf805314a5f8d16cb1e42d2b5810c3f17

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