Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8335fdfe73f1d41…

MALICIOUS

PDF

75.8 KB Created: 2021-03-29 04:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a88d836e60071eea1bda09c1cb3dba8 SHA-1: 67f49159146c97c0713aca0c8ab6d452ff566cfa SHA-256: d8335fdfe73f1d4104a5339aafe9ff7ee13fcc922608322930c9a0e37076bb4d
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the presence of numerous external URLs points to a potential download or redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=define+primal+gold
    • https://cdn-cms.f-static.net/uploads/4503533/normal_6018e8823d2f5.pdf
    • https://cdn-cms.f-static.net/uploads/4417119/normal_6035eb638d5f4.pdf
    • https://cdn-cms.f-static.net/uploads/4454300/normal_6024cfac40792.pdf
    • https://belanuxaru.weebly.com/uploads/1/3/4/6/134670531/vowop-kikolaxijadoza.pdf
    • https://cdn-cms.f-static.net/uploads/4489852/normal_5fdc0e6b0e820.pdf
    • http://igcopyrightverify.com/gumukuw4oj4v.pdf
    • http://oneitshop.info/web_application_development_proposaly40ct.pdf
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/tixeviduso.pdf
    • https://static.s123-cdn-static.com/uploads/4471099/normal_6007fc4090543.pdf
    • https://cdn-cms.f-static.net/uploads/4464053/normal_604fe060acda4.pdf
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5ff5164a1713d.pdf
    • http://vipadminler.org/tp-link_pharos_cpe210_manualyz0cz.pdf
    • https://static.s123-cdn-static.com/uploads/4417206/normal_5ff9c41a58604.pdf
    • https://cdn-cms.f-static.net/uploads/4454824/normal_6022826c5841c.pdf
    • http://pe50off.pro/level_9_skiergdzae.pdf
    • http://picsonair.com/formatos_para_constituir_una_empresa_sunatelm8c.pdf
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/solezilomepesekegom.pdf
    • http://dusakopu.iblogger.org/infographic_timeline_template_powerpoint.pdf
    • https://static.s123-cdn-static.com/uploads/4407064/normal_5fee771843e5c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bokakemipik.epizy.com/mutanewewobidolinupu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf7.bin
60c9c2b4856447d804e3920613ef39a86dc2a1a10ab558f6379de46e7f79f649		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 5184 bytes
font_01_sfnt_off0000fd88.bin
48d844dbde695dd765fb75e0e0c4588850b2938aa9f6cf8b2a625289df85efb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 10836 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.