Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00dc89901ec22f6…

MALICIOUS

PDF

82.9 KB Created: 2021-09-08 21:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 7d1b6f129351a07e1189d9cae0f3d66f SHA-1: cddf4288cb5ebc46e7f1943161a3360e386f354d SHA-256: b00dc89901ec22f6feaee37ecd421df1b92203f419ca88e2572461b07b8dcae0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=protect+pdf+files+with+passwords PDF link annotation
    • http://dsagco.com/Upload/file/milejini.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/bogobo.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109031301058753.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021090710022940.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/zokisepizopug.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/19661053273.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16130273b7a144---sogojijelelobepitevejilo.pdfIn PDF document text
    • http://namlinhchisapa.com/userfiles/image/file/vifur.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/bifilidopufowuvevaju.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/nifobogexit.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/47225502437.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/35847546881.pdfIn PDF document text
    • http://scsytech.com/upload/files/xijudowedijiwawadenekoxom.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/21503790488.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/zinasabo.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/71983877801.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/sonilubuvixeguwagolaj.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/xunutag.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/votudine.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/72125748846.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/41398857322.pdfIn PDF document text
    • https://blokhol.com/upload/files/biguradowuduxufijif.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_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 17448 bytes
SHA-256: b528c73eb198e5e876e681399739d4a73ce5b3449b839d2fd47e70b3caabb67b
font_02_sfnt_off00012562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12562 10700 bytes
SHA-256: 6cd534c5f14df6845b810786cbfc1fc5da5c511af5fe85e39b3e3267f268d4b4

Open this report in the interactive analyzer, or submit your own file for analysis.