Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbc5dade0cbd863…

MALICIOUS

PDF

80.8 KB Created: 2020-12-27 15:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d405115e6c9739c08b5938c1284fbcf5 SHA-1: 2b656e92f63247f521f1d640cc145e09db8bd3e9 SHA-256: 4bbc5dade0cbd86341f72758c710e0659da079b77a025b540b5c4a5972b72a50
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely intended to trick the user into downloading further malware or engaging in phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to a product search, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=shower+head+flow+restrictor+home+depot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420939/normal_5f98991ba16ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fa61137d5f86.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/rekuv-kuwunurod-tudakowupexa-kanarowakoxopub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f943cab1ceaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73105b42-cde3-4cd6-bf0a-210f35dc28d0/7_wonders_duel_agora_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/28401106626.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/descargar_app_banco_santander_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4061cd-db6b-48d5-a99c-413dd4ad53ec/mott__bow_marcy_fitted_crew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd93de3-852f-47d4-be70-8d48121de725/13528639600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b27ec0-5752-4fc6-8ecb-74c42853b7fc/tuvirigamef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab98c53-cb94-42e1-a1e4-f998abdf0b65/manual_laundry_system_singapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aab417e-84c6-4a4d-8e89-ddc2f0aaf0ba/goxurubomisopotaxunedur.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_off0000fe40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 5588 bytes
SHA-256: 393b1e51c90ef938d743f5f838c5ff4f15750bf02ae10b384f46d6d07dccc2c4
font_01_sfnt_off00011132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11132 11244 bytes
SHA-256: 9987439c87c1ac457a910122a327824e19386458d383016a8080bc8f0a9d9c7d