Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d15caad436eb496…

MALICIOUS

PDF

72.3 KB Created: 2021-02-13 09:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a805acbba1bcd0e9b70cbe4b5dd51b71 SHA-1: 8fa1b6fddb31d5d75b652a057a30ca618c1ac593 SHA-256: 7d15caad436eb4969080b0022baba179f093c5ce6ad385ad2822520aed214ec4
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://druttle.ru/wb?keyword=apache%20server%20for%20centos%207 PDF link annotation
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/9529670.pdfIn PDF document text
    • https://juzowesefuzifi.weebly.com/uploads/1/3/0/7/130775985/viwivitaxupexi_defozapixasu_ravaxizop.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/fugapurobever-somikiwanulenu-mibegasiribo-fiforeguxi.pdfIn PDF document text
    • https://lekevemu.weebly.com/uploads/1/3/0/7/130776436/dbe4654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_60232cfca6f6f.pdfIn PDF document text
    • https://sajogosekatoja.weebly.com/uploads/1/3/4/6/134682383/1433354.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/5175064.pdfIn PDF document text
    • https://dikufakeg.weebly.com/uploads/1/3/5/3/135348043/2090f4.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/4246027.pdfIn PDF document text
    • https://bunutawopuzo.weebly.com/uploads/1/3/4/8/134868528/paranezi.pdfIn PDF document text
    • https://rajarajo.weebly.com/uploads/1/3/1/3/131398110/787615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fd7373b70231.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/xupimaral/dikoni.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/89852899880.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/lectio_divina_worksheet.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_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 5200 bytes
SHA-256: 8a1027ad8f333592fe1a25c43aa2c97a44694023894e56ed2494f0d2cb1a1082
font_01_sfnt_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 12448 bytes
SHA-256: 25b581cd3477e85d2e9b4ecb1111366ae3a8d8197a9784652aa994a0248a7f60

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