Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28341948633fa70…

MALICIOUS

PDF

96.8 KB Created: 2020-12-17 05:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: af6e069ed4cf05be019729a5311e2ab2 SHA-1: 45c01f941a27f4ceff76e98158b91f1b8b65c8a9 SHA-256: c28341948633fa70b4d027ae5a14f30ccacba013a9d93c839cc3bca790493f2b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, which is a common lure for phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely leads to a malicious site designed to exploit the user or deliver a further payload.

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://trafficel.ru/strik?utm_term=slayer+ep+guide+tera PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8a1ac758faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_5fd5fe90f0bbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd60cdda998d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_5fda8b0c120d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418778/normal_5fadfc1e25c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_5fc356d9d711a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fb02d2e54216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f9701601b258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_5fda3dfec882e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_5fb67cb90dccf.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/f61c521c-3989-4456-8408-e7e2a093ddb4/pererifa.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/50268997756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f0414e-7cff-4091-b3cd-35549b3e18d5/gibson_music_hall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50cbdf22-7251-4873-945d-e437fd329821/92559882125.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_off00013d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D05 5152 bytes
SHA-256: 458e37611dbeb07236c374296d6532696c23b6b6ffa0ff5a8bb3fc7ef4f435b9
font_01_sfnt_off00014ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA3 11568 bytes
SHA-256: b499f1a481e51f4acf3a2ee0f36efa703c886865753cede03f51f3e4ab21a69b

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