Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce750ffb9f5464f6…

MALICIOUS

PDF

69.6 KB Created: 2020-12-18 13:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d815a47dc2f2920eabdcb8c464d2dbb4 SHA-1: 7a00064334ef64971215902c6d4845c3f4f9504a SHA-256: ce750ffb9f5464f66ffffe0625037dc94f68c17c8bb01883f41494ac2d433d2b
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'trafffi.ru', which is suspicious. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=carmina+burana+pdf+portugues PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5fb43f3cce277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_5fb5b3b395a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fa73f3b03990.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/fofeguj/basic_piano_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bac475-507d-4f85-a423-5bff9a980f3d/walter_benjamin_theses_on_the_philosophy_of_history_analysis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc26b5a08845d0924d83ebb/1606576987300/dollar_tree_distribution_center_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/16404669180.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a5e481da8a590db1d11e/t/5fd69a55de5b1220c033d63f/1607899736373/43758159830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc429b9-1b75-46eb-8319-aadedde928d3/forum_manual_snowboard_2012.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e6897848ba205d325d53/t/5fc7a98ba038a451bcf50c75/1606920587480/didukaduvefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f431ac-bfb0-4d48-9b53-e91c59ccf130/wurivorujoxijenivemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9384cf6-30b0-4f99-9d1a-7cfa2d645842/minafatirepowufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6098fb08-446d-4979-8273-6188a4eb0b90/jaruxasop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8add3dd-e089-4a45-a57a-a42af039a6ff/goxodemumefufuwasefabu.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_off0000d03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03B 5376 bytes
SHA-256: 55af5fc7f9f35f200a6e94b274d7c09345cb93a576d1c1a196a40c30f22df5df
font_01_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 12428 bytes
SHA-256: f362dd097b5b4382429e794566150fc9d8abe8a118dae740d3b085c3b7d05ba1

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