Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fe73ac6e642ac6…

MALICIOUS

PDF

71.1 KB Created: 2021-04-15 12:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 88ace7a63e3519d3311cf14b23d577eb SHA-1: 2e2fb96256911cc3940bcd5759ac199be19a27ea SHA-256: d5fe73ac6e642ac65edace436e61854acd303d0b01e0130f345de96db715a68e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The document body, though truncated and partially garbled, contains text related to 'Pokemon cards', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=display+book+for+pokemon+cards PDF link annotation
    • https://cdn.sqhk.co/lojadisexudo/Aichdij/povorowaxepaximo.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/239f0e3.pdfIn PDF document text
    • http://mezeferatitora.scienceontheweb.net/atividades_de_alfabetizao.pdfIn PDF document text
    • https://nizawubanivud.weebly.com/uploads/1/3/4/5/134529200/43705f.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/19241190711.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/19412504866.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/celebrity_definition.pdfIn PDF document text
    • https://gujibukogise.weebly.com/uploads/1/3/1/3/131380045/mixas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448542/normal_5fe0228818a86.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/mifSozm/25136939923.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/47734702662.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/analog_oscilloscope_vs_digital_oscilloscope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405185/normal_5fcff3541a4c0.pdfIn PDF document text
    • https://cdn.sqhk.co/zaxuloxedu/bMha0gc/pdf_sheet_music_lds_hymns_arrangements.pdfIn PDF document text
    • http://tobaliwono.mygamesonline.org/social_problem_solving_theory_research_and_training.pdfIn PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/binevez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fd067a3b032f.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/kamavumesatabara.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/master_thesis_topics_in_accounting_and_finance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/mukirolimipo.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/87659637620.pdfIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/ergonomics_in_dentistry.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_off0000d665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD665 5608 bytes
SHA-256: bd72f917e3a825af90360e68fed1b1235506b7592cb96a604b77a5ef7a07efdf
font_01_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 10892 bytes
SHA-256: f17380c3fefee1654bc6dd1a8d7a3e19d35b8ebcd06e11e527b5e0bc35ea450a

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