Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31233065c7d378e…

MALICIOUS

PDF

80.3 KB Created: 2020-11-23 17:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 28d4a140a9734a9dff145e89e083a9ae SHA-1: 961f5010f007b1552083b09ccb08c62f949a6abd SHA-256: d31233065c7d378e7eb2a0b484ebba51932313b9abc5df1e75d1c563e6da1509
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafffe.ru/strik?utm_term=atl+full+movie+online+for+free', is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Atl full movie online for free', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafffe.ru/strik?utm_term=atl+full+movie+online+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8d09bfc164b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453118/normal_5fa01203d3836.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/ad01872b-1def-4b40-819f-002c8b32e024/simple_man_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83ac8ed-c442-4c50-8f3c-705404a7cad5/20939974719.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/donald_duck_mathmagic_land_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933025f9-dc0a-4d1d-a87a-7b3d121a5caf/auto_avaliao_de_estagio_supervisionado_em_servio_social.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/68937365471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea23331-5c26-49fe-bc1d-12fb25f77455/11095308117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74edd766-c4a6-460d-8dc2-16696a1475e3/dujunodufomituwos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3531db60-eb70-4c32-a62b-ede0ba1e8c47/gifiralej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8b2ab8-4ddb-4923-9a9f-5f185615d050/55773990890.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/53242440447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a824dd8-0f25-447b-b3db-0b1ae9e2e715/74800968618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02de98c7-9840-441b-8978-d2e0bb24aa78/winudas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cda7e28-7140-47e7-9860-840be70bbc07/mujarejobesufuraburedun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdd6c1e-b260-4dab-853f-e8e9f36bf978/serimixetoso.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_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 4572 bytes
SHA-256: e5838ae143dbd16c17a1ea5b4c33246a47242a299d0e48e4ca03e1eb25a2bea3
font_01_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 11188 bytes
SHA-256: eb6727a9df8424a1e1d0a4c19b25b129ecfe4ebf66c5fa8eebe0615bf314c10e

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