Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfab231a486561dc…

MALICIOUS

PDF

72.0 KB Created: 2021-01-12 17:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dd62d784f8b2ca106bc608b12fb57101 SHA-1: 6b82ce6071e5f1c8b13983dac0585414362096d8 SHA-256: dfab231a486561dc2c70df022fb2d285b30fc7d084f58fbc41b6a6b2c7e7d5e2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing attack delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://traffset.ru/123?utm_term=cuanto+mide+un+metro+en+pies PDF link annotation
    • https://site-1171686.mozfiles.com/files/1171686/server_2016_remote_desktop_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/Ajghjro/35769713316.pdfIn PDF document text
    • https://site-1168045.mozfiles.com/files/1168045/suppository_definition_in_pharmaceutics.pdfIn PDF document text
    • https://site-1218543.mozfiles.com/files/1218543/head_to_head_bingo_party_game_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/mamujevoboxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/77116393709.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/76431920364.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/adobe_creative_cloud_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/barcode_font_for_excel_2016_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/duvevuxemejobudunax.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_off0000db0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0C 4976 bytes
SHA-256: 77b132acf91fd3cb391657783074cd83c3d0386d896500a71e796a5451bcdafe
font_01_sfnt_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 12316 bytes
SHA-256: 5c3c5ddf71897b87960d8653f45e6993908da5940ef4e09e27e62f7291527dc7

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