Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b9670a4165eb59…

MALICIOUS

PDF

74.2 KB Created: 2021-02-20 21:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f2f4463fac58a5d39130357bee2508fc SHA-1: dc14bd0c80f38502f112c46ba97dd8cd23e0f9a2 SHA-256: 18b9670a4165eb59c3fae308855d497373d063c9e98747af3c63467c693ef9f0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious external website, disguised as a search result. This technique is commonly used in phishing attacks to redirect victims to malicious content or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=hamlet%2527s+first+soliloquy+literary+devices PDF link annotation
    • http://spoonnumberone.xyz/10664600546adbie.pdfIn PDF document text
    • http://ourfanz.com/songs_that_bring_back_memories41ju3.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/gikiijh/jebelusirojepejasumavoruk.pdfIn PDF document text
    • http://helpcenter.business/fujadoguleragolevumubuwebj7uts.pdfIn PDF document text
    • http://artistichomesolutions.com/chameleon_evolution_gamebijcs.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/YjcoBjb/42390263691.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/Sx1hjhX/kit_for_dls_season_2021_man_city.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/fhdplkY/gasil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/nenurevejolubevutavet.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/tugalomasorubozikuzopoz.pdfIn PDF document text
    • http://dipomik.epizy.com/reges.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/71468157514.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/33389124462.pdfIn PDF document text
    • http://fukoter.rf.gd/natimixar.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/perfect_squares_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/tubegunobiratuz.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/xamemexuliwupeveresafede.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_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 5452 bytes
SHA-256: 7dbca507c5573f4c44183bb248af5fe7feac7978e6d3350b73be55d3d2c249a9
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 9852 bytes
SHA-256: 77831879eb794fa172476ae4d8acdfa2101d8efff8687c5f6e4dacdc0f6c26ed

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