Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257534847f5cfec…

MALICIOUS

PDF

77.1 KB Created: 2020-11-16 19:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: df079a540fc073ca99959f3e8af0ccae SHA-1: 1e82746626ddff22c2c48ccfdad0caf452d745d9 SHA-256: 4257534847f5cfeccb06b5ee2a5c37db17029a7028b0089c5a351fc4f50b76ce
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/strik?utm_term=minecraft+tablete+indir In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5fa4457b2146e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fa972418de21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f8b1f0aadd6b.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/1f552975-3bda-4676-9126-5ffa4fe6e7ab/nukinidakigupanaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fdcbfa-d485-4338-b934-2b57f4b63f77/wokavitulipotuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/delonghi_ew7707cm_oil_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/chapter_4_answer_key_geometry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0788e6-a500-4aff-bde2-1aa258a19965/silogulunumedisafipon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2dcd955-c5b8-4fab-994d-0beffcde0a44/68114121691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083dbd3b-23e3-45ed-bbaf-6161619e8b7d/68187032798.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/brain_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e8a5e9-2744-4b02-bf2d-3baeb04660ad/90967165352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f54d27-4777-4a6d-a72c-06a19174cacd/.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/aprendizajes_clave_primaria_6to_grado.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/71155905018.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010c3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C3B 17976 bytes
SHA-256: 5f2b8354c98906ac198f43765efe9a53c20495f3d165d2f808e9d18683672021
font_00_sfnt_off0000d20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20C 4980 bytes
SHA-256: 59f49efabf9a98a3285b137d50bcaa70031e6dfe0f2ebf0796d84e4dea897e37
font_01_sfnt_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 13160 bytes
SHA-256: 6a09f538992573bde7eb12830b3d23d0b96ed26c07efa269e3a05d217dea6ec4

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