Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdb65ea6f977a23…

MALICIOUS

PDF

83.3 KB Created: 2021-03-25 00:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a9975ef68471067f669d446a227e27d SHA-1: 3cae6d30baffd178cd02a12c25bc28aeeebe4a24 SHA-256: 6cdb65ea6f977a23da7df07679826b48bd30f19b3e3678e6fdb947e7eb3fbdb2
104 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically a URL that mimics a search result for a handbook download. This, combined with a visual download button lure and ML classification, strongly suggests a phishing or malware distribution attempt. Although no scripts were extracted, the presence of a suspicious URL points to a likely download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=midgard+heroes+handbook+pdf+download
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6034282e08d3c.pdf
    • https://cdn.sqhk.co/mixaluwekitu/iiznjgz/zamijan.pdf
    • https://cdn-cms.f-static.net/uploads/4483104/normal_603f123f8a4cd.pdf
    • https://static.s123-cdn-static.com/uploads/4374359/normal_6005bee88b303.pdf
    • https://cdn-cms.f-static.net/uploads/4459621/normal_604b6585ac17d.pdf
    • https://toxupuxuforiri.weebly.com/uploads/1/3/5/9/135966975/6320073.pdf
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/dafazenigavifi.pdf
    • https://cdn.sqhk.co/vekuperik/7VGhdtj/tezaditopojapadosujoxov.pdf
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fdc6f09f22f7.pdf
    • https://cdn.sqhk.co/fetumamuv/gujiqja/wings_of_fire_movie_1967.pdf
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5fed59e4ec3db.pdf
    • https://kafijojiwagovi.weebly.com/uploads/1/3/5/3/135387916/bapulokab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jijumupade/geometry_dash_vault_of_secrets_answer.pdf
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_cdcdd12657b74992bd8c3c3575d2807a.pdf?index=true
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_9cf147e4ba854246b600edb0f0e5752a.pdf?index=true
    • https://s3.amazonaws.com/fadupazageraf/chickies_and_petes_nutrition_information.pdf
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_7d59403e97dc4d62afb6850ca4dc0f2a.pdf?index=true
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_b2d1d943e4ff43ddaf86d22db5ff7cda.pdf?index=true
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_5466476fc9834d589fc8d5c36b8064ae.pdf?index=true
    • https://s3.amazonaws.com/nedijowewoded/weather_report_salem_oregon_hourly.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105b3.bin
48ecddede2fe76179e540451c3cc31762b6dd7ec93f0cac1b283341ad4a21929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 5604 bytes
font_01_sfnt_off000118da.bin
7444b84fd6340e135dc51a29ee9db723a81dcf3672187edd00af17902b3bcc96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 11564 bytes

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