Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30bd1f4cb7effec…

MALICIOUS

PDF

109.9 KB Created: 2021-04-29 13:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2916b6e8146ac1236360deed46061629 SHA-1: 1aed03def281365b0782cbab2881d180679b00e9 SHA-256: e30bd1f4cb7effec1abbe006877e0d059222ba8985cf4357602fcd2c97b4bef8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://jacksth.ru/strik?utm_term=kezia+noble+pdf PDF link annotation
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/tuzotobi_lugevadunaki.pdfIn PDF document text
    • https://misurenagikokiz.weebly.com/uploads/1/3/5/3/135332419/6a5a36124e5461b.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/geicajg/tilutapibesojo.pdfIn PDF document text
    • https://vopasigujar.weebly.com/uploads/1/3/0/8/130813381/2755427.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/ebiaidy/bazunol.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/RgePzjh/cramped_definition_spanish.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/3688686.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/7ef33596600d.pdfIn PDF document text
    • http://puralivivupose.iblogger.org/vukafu.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/gghg7jp/best_forex_trading_learning_app.pdfIn PDF document text
    • http://genogiwibodel.iblogger.org/66760757253.pdfIn PDF document text
    • https://jutarufuro.weebly.com/uploads/1/3/0/7/130775772/a22b95e07b55a.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/tenimukir.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/jjcAL7C/99138598946.pdfIn PDF document text
    • http://doxedisipi.scienceontheweb.net/moodle_learning_management_system.pdfIn PDF document text
    • http://mixevome.22web.org/wuxodopogi.pdfIn PDF document text
    • https://buxufuniwa.weebly.com/uploads/1/3/4/7/134717035/7ea0bd8621903df.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/materi_metabolisme_kelas_12_lengkap.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/autism_spectrum_disorder_dsm_v.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/ranugozawipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipetitumi.rf.gd/65612246128.pdfIn PDF document text
    • http://mojuwuf.epizy.com/59841787115.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/laporan_praktikum_titrasi_redoks.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_off0001708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708C 4920 bytes
SHA-256: b211089de064311ba69ed39d0df7abf823a2d50004ef2dcbb583467504568c35
font_01_sfnt_off0001816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1816A 12028 bytes
SHA-256: 3e9a0d9323b3ef7e48036bbefa42bffbececa65afc3e417a8071bb93cb863177

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