Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0019d769fc06269…

MALICIOUS

PDF

73.9 KB Created: 2021-09-21 03:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01714e76813ae1bec1bb4ac8b0c8dbfb SHA-1: 03e856aacbfa5dc39fb7567f95c2d377623e329f SHA-256: d0019d769fc06269059ff7705b0b36437f98f2946d4f4eab5a49b83e8711d9fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. The file's structure and embedded links point towards a spearphishing attachment, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=broadcast+receivers+in+android PDF link annotation
    • http://bolshunoff.ru/images/wysiwyg/file/rijuxebetikilodumozozesaw.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/31082984299.pdfIn PDF document text
    • http://zzweien.com/d/files/26874773198.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/59056562940.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/mural.pdfIn PDF document text
    • http://atomleasing.ru/media/File/jafagetidonifu.pdfIn PDF document text
    • https://durimawar.com/contents/files/lagaliregoraf.pdfIn PDF document text
    • https://ancoraeducacion.com/images/nugejetotojive.pdfIn PDF document text
    • http://hasyo.net/files/file/famulo.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210903234857.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/79806549052.pdfIn PDF document text
    • http://kcpsystem.com/userData/board/file/51878512411.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/pasakubafezopabojurax.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/tevobobemitijas.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/13569879866.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/20668200186.pdfIn PDF document text
    • http://dakov.hu/_user/file/majijol.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/mivonizopu.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/73727244604.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/tinudagigevixiz.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613939ab00d43---5743138720.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/20741896462.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/70840858950.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/77356321109.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/texasunuxuzejitatasakas.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04B 19920 bytes
SHA-256: 4f76269e3f6d6ccd052bcbb0f5276474317d39a6b7e26dac90bb712917dc5340
font_02_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10436 bytes
SHA-256: 6eb6223de92a4df47ef295bd50dfa6e90efeb1a9142e67b0e2e6ca71d02e332c

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