Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cb56b6d0905a68…

MALICIOUS

PDF

81.7 KB Created: 2021-04-09 17:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bbcba8b5cac452053401a64a2d735398 SHA-1: 23635489579d0035c35b5c7e83518ce50335f72e SHA-256: 30cb56b6d0905a68f468abfa0322bcb4a186e7f14b198b83104e8ea6184e5d75
126 Risk Score

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 0.9993

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://soxebez.ru/strik?utm_term=canon+powershot+a520+maximum+sd+card PDF link annotation
    • https://famereruzune.weebly.com/uploads/1/3/1/6/131637342/bd514d1927.pdfIn PDF document text
    • http://goxakawelapa.22web.org/81789264076.pdfIn PDF document text
    • https://nobibiraxofos.weebly.com/uploads/1/3/4/9/134904538/4814e2c.pdfIn PDF document text
    • https://fizinizaboz.weebly.com/uploads/1/3/5/3/135304720/5394268.pdfIn PDF document text
    • http://getyourscore.info/swat_team_training_scenariosdcpel.pdfIn PDF document text
    • http://vedatolinofiz.iblogger.org/bioterios_en_mexico.pdfIn PDF document text
    • http://riwopebikiguwa.mywebcommunity.org/62575218586.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/performance_appraisal_letter_sample.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/4427323026.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/ziwovepurol-velexofe-towudejamate-jokerozat.pdfIn PDF document text
    • http://abwaab.su/township_and_range_system_quizletxax8z.pdfIn PDF document text
    • http://shopmzm.site/37474037089zgk5b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/esquizofrenia_paranoide_fisiopatologia.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/nobibezokibifameke.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_f8800dc5481845c19f4dfb507cb96583.pdf?index=trueIn PDF document text
    • http://beliraguw.onlinewebshop.net/milurinamalopukugonotigi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/15698566077.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/how_to_become_a_certified_spanish_translator_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/17818654888.pdfIn PDF document text
    • http://zuvovebedevavu.rf.gd/philippine_professional_standards_for_teachers_reflection_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/merabemerijeba.pdfIn PDF document text
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_db60ff6226864aec821b424384e00c2d.pdf?index=trueIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_f298de7f901d4319abc4e08c00670c12.pdf?index=trueIn PDF document text
    • http://nisifibuvez.epizy.com/zobapomoz.pdfIn PDF document text
    • http://velewetuwo.rf.gd/datusetewejejano.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_off0000fda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA0 5744 bytes
SHA-256: 75a0e97a0557e076ddab8f9b1447db678b07673e020aefd5a061670e270bdc41
font_01_sfnt_off00011122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11122 11156 bytes
SHA-256: 4fbe3666ab478de9ad00969fac54a23fac0051f26d32690b637b224ecfb7d705

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