Malicious PDF — malware analysis report

Static analysis result for SHA-256 5270115503068be4…

MALICIOUS

PDF

81.5 KB Created: 2021-04-18 03:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c18e503325d6a86e9cfd7dac8e7e6dec SHA-1: 8481aebb23d14ed9fecc6a942265f03a1d35ea42 SHA-256: 5270115503068be4fdbcd4521995bca94af13e5d84cbba46a1883ed11901d613
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicate a high probability of maliciousness. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The embedded URLs and the PDF structure strongly indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/strik?utm_term=can+netgear+nighthawk+be+used+as+an+extender PDF link annotation
    • https://jaxifojuw.weebly.com/uploads/1/3/5/3/135351184/kebuguj-dulupirato.pdfIn PDF document text
    • http://gibutimef.iblogger.org/cedula_venezolana.pdfIn PDF document text
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/259067e57.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/hQhvjfo/lumuvanukinefonavorotina.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/bjdgcdS/vawotekafisikugenutivudim.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/nofew.pdfIn PDF document text
    • http://libosuwobeg.iblogger.org/is_under_the_dome_finished.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/iibjfjj/rajisujebozewuvug.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/c4gfO8h/ruxepejapasimegepokela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jojofolarimema.epizy.com/15646636727.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/marquis_de_sade_juliette_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/polar_ft60_battery.pdfIn PDF document text
    • http://parubowigul.epizy.com/65434451913.pdfIn PDF document text
    • http://tixerewolulas.rf.gd/best_tv_s_sites.pdfIn PDF document text
    • http://kibototudezusob.epizy.com/49948936499.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/78934890778.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/netozafetajero.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/95542468104.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/vidyasagar_university_syllabus.pdfIn PDF document text
    • http://gipizaz.rf.gd/baixar_jogo_motoqueiro_fantasma_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/wajexabelatozekalum.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/how_much_does_a_senior_first_officer_pilot_make.pdfIn PDF document text
    • http://dinonikof.epizy.com/vurifadekila.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/lesson_plan_template_elementary_common_core.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/adobe_cloud_suite.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 5216 bytes
SHA-256: f4e017bf49bf3c4340fe702831883389277605eab2a52afbba83ceabac67a3ab
font_01_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 10676 bytes
SHA-256: 8339b07eed3be5eb6c36a866165f4f3fd6a372583b8a408b11edeb9eb85f2eec
font_02_sfnt_off00012a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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