Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c35ab5fd0ea0de…

MALICIOUS

PDF

57.1 KB Created: 2020-11-28 22:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1a8ca5b0090ea92938a3a29fef7c48c6 SHA-1: 1ef78bdc42ddf2caba971a2ff9e486b902cc1cc8 SHA-256: 35c35ab5fd0ea0de69db817737e0ee909396bb7826dc1ace24cd58e1e025e428
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, disguised with text about 'best flannel sheets'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of an external URI points to a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=best+flannel+sheets+that+don%2527+t+pill PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465151/normal_5faddc427d44a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f9c6848bdfd8.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/9d21223c-11e7-4122-9a9e-48fc9ba1609b/84374992144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6235f1fd-2bf8-4eae-9f0f-1bf1ec1e2edd/dazel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b85a43f-82f0-41a3-91c8-d07b5b822fa2/namaxegapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787cf930-0dae-40c6-bbbd-d17a99860c91/mamevemodamigisovoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4581c666-6d12-475a-b154-e688807cc4df/71875252884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f4c4d0-f349-4656-853e-57e68df27376/difidimunukogagav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5b4b55-9b37-4da4-a9bc-5ef449e2969a/siwurisatotedowusil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a29537-8948-45c9-92eb-43f77a21402b/71871795885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c8f191-05e2-47d4-811d-8256dc6ff3f4/xiwifapinoduniponawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c123f3f1-7b80-4ca3-8ce1-43fdd802c8cc/tigejagawenoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c411bdd7-77e4-454e-8f9f-9f4525d5e508/dirios_futmas_sbc_jogadores_de_ouro.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_off0000a80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA80A 5116 bytes
SHA-256: 90a2042dcc255ff78e815698870208d981e96353e6ba9a6f8965eecd65d6a88d
font_01_sfnt_off0000b97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97A 9148 bytes
SHA-256: 2b5acd3b5e5b8421fce431f46389eff2efe0077d1a8eb2ceb768f77928f96f38

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