Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d1b92b8bb379e2…

MALICIOUS

PDF

76.0 KB Created: 2021-02-21 09:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: f46381cb1daa0afc4ab224e2d6699c63 SHA-1: 16d9cc0a13ae0f25c135a1aa262bd4f3813b01a5 SHA-256: e1d1b92b8bb379e2a08bd266f1a2e18dc378751f274842e67d7e7556867434a1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, with one pointing to 'leonvi.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

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://leonvi.ru/wix?keyword=strike+force+heroes+unblocked+hacked+weebly PDF link annotation
    • http://tdsevsvet.ru/dorurepusebajemuzise4he04.pdfIn PDF document text
    • http://citimart.online/arteriovenous_malformation_of_uterusidb9i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_602f0e9f8e453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5fe9f3944934d.pdfIn PDF document text
    • http://gachihyper.xyz/38574948432o2sko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379731/normal_5fc604a78ea73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fd657a90a1de.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/9mFIwjh/hay_day_game_for_pc_play_online.pdfIn PDF document text
    • http://muzolifuvekimew.22web.org/721874057.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/j8oihd8/cartoon_spring_boing_sound_effect.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/zaxawetawupo/cad_free_2008.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/71655838777.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/20495141845.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/type_of_parliamentary_form_of_government.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_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 5612 bytes
SHA-256: 895f91172867a880612081bfe58a1b3549f0d1aec741a1f2e8080b1dc38a5b9c
font_01_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 10080 bytes
SHA-256: ea0575f7a1c73b36c708d9272831854ae26dc1d4e19e36f30c85b5105fbebc62

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