Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f7c3e5d06980ed…

MALICIOUS

PDF

63.0 KB Created: 2021-02-11 23:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b248402714b890f5d1a1a902ef742e9c SHA-1: ae853172a26db223037faa40cd106c53cfabebca SHA-256: 52f7c3e5d06980ed5c0a52362f2921cca07f4dc779b554a722fb7c1c226e2dac
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://seumenha.ru/wix?keyword=pokemon+tower+defense+2'. Heuristics indicate this PDF is part of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

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://seumenha.ru/wix?keyword=pokemon+tower+defense+2 PDF link annotation
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/15e242ce.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/2104622.pdfIn PDF document text
    • http://gaxazoxisis.22web.org/ballot_paper_template_excel.pdfIn PDF document text
    • https://pojuzalik.weebly.com/uploads/1/3/4/2/134235388/gibujibedinip-fiduregasufa-wabololiwa.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/woris_redaboloku_mulazezer.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/be5ad1903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://datidogebe.epizy.com/79343176633.pdfIn PDF document text
    • http://livajurusurex.epizy.com/color_green_worksheets_for_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/79838631990.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/bangkok_tour_guide_chinese_speaking.pdfIn PDF document text
    • http://judewal.rf.gd/2010174555.pdfIn PDF document text
    • http://kidojudal.epizy.com/jumipasuno.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/analytical_balance_lab_report.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/31850535869.pdfIn PDF document text
    • http://zubumedi.rf.gd/avatar_music_indonesia_apk_data.pdfIn PDF document text
    • http://nexuvojof.epizy.com/business_plan_template_executive_summary.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_off0000bb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB03 5100 bytes
SHA-256: abd2f59d2044ee1c3d347ac61b29d28741eefb966a758582f18976f5b210deab
font_01_sfnt_off0000cc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 10160 bytes
SHA-256: eb73448ca3b44089f25beffec0d7e7c37b86f3b52943213add7c312c2f0f4f2c

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