Malicious PDF — malware analysis report

Static analysis result for SHA-256 50da24d3adc58d56…

MALICIOUS

PDF

73.0 KB Created: 2021-05-07 05:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5a8329a31349c78e8f3222fcc25286fd SHA-1: a92dbc431433369e24bea772b8b628cbfebf1980 SHA-256: 50da24d3adc58d56388b74ed5cbfeb828c1788468f1afdae5efd42a00091f7b2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a search query related to '7 years old lyrics video download' in the document body, combined with the numerous external links, points towards a lure to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=7+years+old+lyrics+video+download PDF link annotation
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/5b89f63df.pdfIn PDF document text
    • https://tivaxuxilo.weebly.com/uploads/1/3/4/1/134131375/woluju.pdfIn PDF document text
    • http://instapriz24.online/vezetofovabepodetiwularicvbe6.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/mastering_bitcoin_download.pdfIn PDF document text
    • http://tevalevas.22web.org/80538846944.pdfIn PDF document text
    • http://italy50wow.pro/sojuwedoponedivdsgon.pdfIn PDF document text
    • http://thiswaytovogue.com/82780829397q4uoy.pdfIn PDF document text
    • https://vopisozojozesa.weebly.com/uploads/1/3/1/4/131407388/6515991.pdfIn PDF document text
    • https://lalupapetawosi.weebly.com/uploads/1/3/2/8/132816164/1032362.pdfIn PDF document text
    • https://busiwilepajij.weebly.com/uploads/1/3/4/3/134353274/ac0d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molezegifa.rf.gd/wavelet_transform_in_digital_image_processing_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648836c9-5514-4681-b369-8d5987d5a2cd/99666337461.pdfIn PDF document text
    • http://gagugitebuf.atwebpages.com/97458719438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832f4835-91ab-4c11-b492-5e37907a68ae/lomux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da49482-cde3-431e-bfa2-53d927170804/immanuel_kant_books_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc24c634-d008-4fa2-bf69-ddd35ebc16ef/tonul.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/informe_de_auditoria_interna.pdfIn PDF document text
    • http://segurixuzek.myartsonline.com/bafizeberoxuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c68585-6ccc-4197-86ad-8a293223dd6e/nebideriwowubumejusugazap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d2faea-43ea-46a7-8501-0c16ba75606d/89881751773.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/what_year_is_chemistry_in_high_school.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_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 5172 bytes
SHA-256: d3423b07443384b7e193f702267a10ac22732072434bbf1c6d619f3bf11403cc
font_01_sfnt_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 10612 bytes
SHA-256: 21e604b6b6b6dd00a1ccf1a8615251f97b9ca037f67c78e1f9b59f96924a04da

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