Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0de2c19b31866b…

MALICIOUS

PDF

101.8 KB Created: 2021-03-16 09:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 97408d01910f2ef2e1849b0be6beda2b SHA-1: 7f824071dc3a275a61b95540c1a7f32f3004f08c SHA-256: 7a0de2c19b31866b8438ccb9b44bfc83c6101b3c81a9d5e586ac731ff87a73b5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://crophysi.ru/wix?keyword=pandora+one+paid+apk PDF link annotation
    • https://laludigulasi.weebly.com/uploads/1/3/1/4/131437637/sufaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/5jgyBhh/21434256833.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/cxDhjhe/21431938957.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/kiJs7gg/dawarato.pdfIn PDF document text
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/jilagiwuj.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/teHsihz/jagudurudumozev.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/hjchfhj/terminator_dark_fate_2_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/heheUhb/spinach_dip_recipes_easy.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/rezefeki.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/dfjgfhj/paint_by_numbers_creator_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/dhjGrKF/lomexa.pdfIn PDF document text
    • https://lipuguxe.weebly.com/uploads/1/3/0/7/130738524/1933281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_5d7427eda6564ece9f254c3460018202.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_0aa7276032b9464eaea67e01ac90cffe.pdf?index=trueIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_c30ab80ab3a94182aa555400efa2286e.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_02610640b55e4dea827ed2aa4c3b5014.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_4769c1d4db6a4429858d669229cff150.pdf?index=trueIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_8c54b9b93bc34d6ead4f163ea4a38165.pdf?index=trueIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_34007c5316c8426c8be48b3c4c546b50.pdf?index=trueIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_fc6eac98fb3545d49d6b07d464612e85.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13991 6112 bytes
SHA-256: df324459920325688a71968387d2f471501de5853f3820072a2348beabf4720f
font_01_sfnt_off00014e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E75 4808 bytes
SHA-256: a018c69c91d7ee245178d1121a204e2afc269b023ea8084bc2f78676c5c72f3f
font_02_sfnt_off00015ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE1 12392 bytes
SHA-256: f7a36372bb8668ecdcf69e5da96969ebd39514cddd372410ae617642cd011619