Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9e0ec7a98f6679…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 11:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5615c02aa3e8924fcd9664ecf18cf2e SHA-1: 7af9f3cdeb364f5f7f3e573353f7494e179a4ff1 SHA-256: 7d9e0ec7a98f66792d2a1008e176feaf0caec45f4a1f48feb9c90e2dd5fa16a8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, with one pointing to a suspicious domain 'resalured.ru'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=cordis+die+translation
    • https://refodalisa.weebly.com/uploads/1/3/4/4/134437853/6659814.pdf
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/puzujoga.pdf
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/6734c30ea5fb.pdf
    • https://lipamonevarila.weebly.com/uploads/1/3/1/4/131453989/mazadijoxexizu.pdf
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/sagoxezujowodosoveva.pdf
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/3922791.pdf
    • http://argo-tourism.com/266462341761qpqb.pdf
    • http://lishop.site/what_does_the_colored_arrows_on_snapchat_meanb2ynj.pdf
    • http://helpcenter.business/infection_control_certification_study_guidessb60.pdf
    • https://kusikulovaledif.weebly.com/uploads/1/3/1/6/131606813/ragobibi-wakexamiribi-duzurisiroxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juzinaramip/how_to_check_transmission_fluid_in_2007_vw_beetle.pdf
    • https://s3.amazonaws.com/tamobalasu/30913846394.pdf
    • https://s3.amazonaws.com/jikopot/autodesk_bim_360_field_android.pdf
    • https://s3.amazonaws.com/davawina/barclays_ppi_claim_form_address.pdf
    • https://s3.amazonaws.com/defipedibe/tawapod.pdf
    • https://s3.amazonaws.com/kitakilesa/67779659858.pdf
    • https://s3.amazonaws.com/lorifawuvawot/51999181761.pdf
    • https://s3.amazonaws.com/polojuliragam/national_competency_based_teacher_standards_philippines.pdf
    • https://s3.amazonaws.com/mipizaju/20517283033.pdf
    • https://s3.amazonaws.com/fosagoba/62106297275.pdf
    • https://s3.amazonaws.com/nojemi/bebozukuwabigutimenabibab.pdf
    • https://s3.amazonaws.com/vapelurowar/hand_held_circular_saw_with_laser_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f1.bin
588639e8a82d7e6d7d04abe25da170714df1eda6d8f1c054e83e10d086545248		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 4724 bytes
font_01_sfnt_off0000f302.bin
9abacee67e8e1d3f9ac7328f756f667a5eb790ee8e289c86d29af5fa6c9bb107		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 16540 bytes

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