Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8e32b941c71b6e…

MALICIOUS

PDF

72.0 KB Created: 2020-12-30 23:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6638a89cea94c1abe0358f056ca7344c SHA-1: 9b9ab9a519720fbe0baac3f77ded169dc6ac56f6 SHA-256: ad8e32b941c71b6ed1dce0503ce29ff43055fabc341be45b14e282e102ac959f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a significant number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to obscure malicious destinations. The presence of a URL related to 'warship battle game free download for pc' indicates a lure to trick users into downloading further content. ClamAV detection and ML classification confirm the malicious nature of the file, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://traffnew.ru/strik?utm_term=warship+battle+game+free+download+for+pc PDF link annotation
    • https://niliwuwez.weebly.com/uploads/1/3/4/2/134265541/5496989.pdfIn PDF document text
    • https://zuwodavipufowaf.weebly.com/uploads/1/3/1/4/131408056/3801310.pdfIn PDF document text
    • https://nolugebufumo.weebly.com/uploads/1/3/4/5/134597996/d91872d109f72.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/zevoginagetutag.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/zozuxugufobewaj_puderitesajob_jafuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5fa3c83c54960.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/bewibiwat/sabivixanumilisadaxebub.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/suduvoxuretafupin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98fc5f1e-dadb-47f5-b7df-fd35e8b2a23a/nbc_sports_app_ps4_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/jezategidurulavabogeseli.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/hiring_poster_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/active_warrant_list_for_eau_claire_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18296113-ec80-47ad-9440-49dd7abe3f94/alien_streams_firestick.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_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 5812 bytes
SHA-256: 255d339d2b4481fdacb1d904e2d49a572da52c32a30ff0840bfa08f397ac4158
font_01_sfnt_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 10252 bytes
SHA-256: 38bf89ace7b01db0874c825cf3147292cfeae2d221ebc9f7face2a0b095defbc

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