Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d9567157b8eb8e…

MALICIOUS

PDF

75.9 KB Created: 2021-03-18 06:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b6a6da4666c423b92c995c219961af8 SHA-1: 8db73fcd3e6d822883369e30faac40b4834c3b98 SHA-256: c4d9567157b8eb8e3c07262249409957889037e7de718900d6e2095fb96c3040
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://mezovuduw.ru/award?keyword=world+map+with+countries+pdf+free+download PDF link annotation
    • https://fefosixofenovi.weebly.com/uploads/1/3/4/7/134755919/baroxaz_nuratifeponolaw_sefirizoretugex.pdfIn PDF document text
    • http://you-bestshop.xyz/planeacion_estrategica_de_recursos_humanos_definicion3j31l.pdfIn PDF document text
    • http://nazhivy.net/598916128548whj6.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/57534691810.pdfIn PDF document text
    • https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/8341943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_604631a22290f.pdfIn PDF document text
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/muxij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_5fcc840050705.pdfIn PDF document text
    • http://wepisoja.mypressonline.com/rya_book_bank_application_form_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_601dc0507afb2.pdfIn PDF document text
    • https://mijipunipiju.weebly.com/uploads/1/3/1/4/131455283/tugekufoteruzo_nefemaxawe_sadogawusimasax_wawawufuma.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/domatubudoxumil.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/fokesemibas_vekenazun_fofakajopu.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/rexosikuk.pdfIn PDF document text
    • http://blablablacar.online/visual_workflow_developer_guidewicvw.pdfIn PDF document text
    • http://gafabotipunofu.mywebcommunity.org/acne_vulgaris.pdfIn PDF document text
    • http://healsmall.space/48443395377jpa9b.pdfIn PDF document text
    • http://beamorem.com/ali_g_indahouse_yify75eww.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitulogakapede.myartsonline.com/perspectiva_isometrica_ejercicios_resueltos.pdfIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_82dbbdd8686149a7a72d95db186ac43a.pdf?index=trueIn PDF document text
    • http://wudemexa.myartsonline.com/breath_of_the_wild_mini_guide.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_e00dd66780194ebcace5effeecf43fc9.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 5500 bytes
SHA-256: 7f2da03ff6fbc0e3936dcfa4cd6d1ff06634dfbde2823155de92a9d9ce419772
font_01_sfnt_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 10896 bytes
SHA-256: 8b4632e2b1038ad295049dd81f1dfe46ab1cfa99746fa31eabcbfd0ff1a28826

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