Malicious PDF — malware analysis report

Static analysis result for SHA-256 069df475e042c0cf…

MALICIOUS

PDF

69.0 KB Created: 2020-12-23 05:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ff546fc8db039b47359041558db69c2e SHA-1: a1c9c584dd0ddff772ffbedc20abdd35afa7300a SHA-256: 069df475e042c0cfdfddabf86862934737201032dd52958f8765881527f64d46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified by heuristics as a link farm and flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'dancing balloon man video', which is a common tactic for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the overall detection by multiple engines strongly indicate a malicious intent.

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://trafffi.ru/strik?utm_term=dancing+balloon+man+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f9913f0bf855.pdfIn PDF document text
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/sibuwuviv-zebafumip-pilizo.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/pizojida-dofajuzijugiro-sojowodu-zasogimi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_5fc02babc7a18.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/wuzamipud_polaguguw_sifisoseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5fb7d17853013.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/9074411.pdfIn PDF document text
    • https://buwirudoxux.weebly.com/uploads/1/3/4/5/134597973/tigawozonuk.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/14206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fb926ce91e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_5fa779c18e466.pdfIn PDF document text
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/ramuxaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf837e18c5c478ec16a2a/1606285367626/41489069385.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9036b97992eb55c1f46/t/5fc3b1946457125654ac9da0/1606660500287/buwoju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3133f75b166439a5994/1606284052654/wekanozedat.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_off0000d0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 5184 bytes
SHA-256: 3dd867231126a9769e4a4b2148e479eafe41f20b62e0efcca5549a2a33385908
font_01_sfnt_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 10844 bytes
SHA-256: fb5cd43fbaca3dc8554c4a3b0e930cdc18fed6ffe9db40fb978d3e9e627d7c07

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