Malicious PDF — malware analysis report

Static analysis result for SHA-256 e799a148c5f4ac79…

MALICIOUS

PDF

80.4 KB Created: 2021-03-03 16:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4d1d36993dd78cb805e8c04594399df9 SHA-1: 2741f2490003d735e06eece7f6314c9f9de886b9 SHA-256: e799a148c5f4ac7965a127156c37f60da4c995a47be95f771b45a8c49960d7f1
224 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, some of which are invisible and point to suspicious or known malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's content, though heavily obfuscated, appears to be a lure, and the links are designed to redirect users to malicious infrastructure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://crophysi.ru/strik?utm_term=guerra+de+guerrillas+significado In PDF document text
    • http://bamirajewenexo.medianewsonline.com/fitbit_versa_lite_smart_fitness_watch_review.pdfIn PDF document text
    • http://begetus11ppz.xyz/how_to_replace_v8_dyson_batteryy80gy.pdfIn PDF document text
    • http://50offshop.pro/77356561803qee49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fef69f201dca.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/magician_of_chaos_deck_duel_links_metaqds06.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/24492585420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_6029dfb6274ba.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/71456961470.pdfIn PDF document text
    • http://discount50.pro/63787159569x7n86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394082/normal_5ffb90d79be2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_60220be6e2711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakeviw.myartsonline.com/taxoludid.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/taen_taen_fish_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/market_swot_analysis_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/76853851844.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/negomagojisurakovab.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/gaddafi_stadium_lahore_pitch_report_today_match.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_off0000fbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 5220 bytes
SHA-256: ce7b57fca86d6de24fcb9bf82e8c507a673049c29a6a20a3d2943a7ad384683b
font_01_sfnt_off00010dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD1 11296 bytes
SHA-256: 89806d4ea2d1e83c029c8026a0022a82fd3d2d16a18e79e23bd310958d3f54de

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