Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b95506267c797ab…

MALICIOUS

PDF

79.9 KB Created: 2020-11-25 21:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c850dfd2338576e76f63e1cde34d72d8 SHA-1: 973e01448ba5aaa0b634a7760789edede511b40e SHA-256: 3b95506267c797abd3e440dfe901c873477c52700913d0020614ceac6d7f5459
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, trafffi.ru. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to checking the safety of a service like StubHub. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent, likely phishing or redirection to a malicious site.

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://trafffi.ru/123?utm_term=is+stubhub+safe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529024/normal_5fb9b675012fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5fa4cc4f21434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5f9bc45aedd4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5f9585781ee74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451742/normal_5fb59ecf0bffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5fb2b3fe4115a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_5f93d74d57f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fb5a3f74e473.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/965e4d83-2f82-4d36-bd89-2d5fd11388ce/descarga_de_msica_libre_mp4_cancion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd227a37-fe23-47e1-b657-c999fc3b780b/87051036396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364dd214-4cf1-48a4-9aea-49fe15f6aaac/71514042307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1168712e-b50c-4888-8b9c-69853bfd16ee/lavisorixamavajitoxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d1b0e9-56f1-48c0-a62e-2e4479b34c87/underearners_anonymous_podcasts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1280e4c9-a8de-4c33-ba0b-2c468c3b4431/xetevit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e3a57e-a1ff-4912-9b3f-b7e6f06886dc/major_religions_of_panama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1727b27-c6b7-49dd-a7be-4e88ff61840d/37994134717.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_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 4804 bytes
SHA-256: 93892160d462a3520242412366040c9f5565f9454af893b7fc3ffe54a4af6df3
font_01_sfnt_off00010c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C20 11256 bytes
SHA-256: 5e23eef578344c4e82a156b4a9173fd5166eb83438dc01248bc3045ffd804fff

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