Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ce49ae97f3c904…

MALICIOUS

PDF

196.2 KB Created: 2021-07-16 04:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ac379154a2710ff8ecae4cbd8fdb1228 SHA-1: 7055d9e5e9d69f0da12c824af052db27fe3c93b5 SHA-256: d8ce49ae97f3c9049910c093102c4abf03d19800bf82eea37bf4e423b47f9831
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://debandhelder.nl/ckfinder/userfiles/files/vojaviwemufodizivad.pdf In PDF document text
    • http://nguyenthaotech.com/upload/files/58565958244.pdfIn PDF document text
    • http://hasyo.net/files/file/ruxovoxe.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ae632077f003dd14fb7a18f69c277178/37225551672.pdfIn PDF document text
    • https://advik.net/userfiles/file/65287191581.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/44924328270.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5ace7cb1b---19562798922.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/dofuvudakinirafi.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/23249355174.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/55193854196.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/039775d96b3ffa0a279ad482bb0af510/37117107082.pdfIn PDF document text
    • http://omg.su/upload/File/gefeja.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a84742d3158---2012618424.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/fowinibitozujigifeso.pdfIn PDF document text
    • http://soles2walk.cz/data/file/73760842231.pdfIn PDF document text
    • http://voijin.com/userfiles/files/linasuketubagozutadasawu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d1d320084---jipunifu.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/nuremeboririkose.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/e9b8be4c230dd0fad3b0dc701ca0454b/2131296850.pdfIn PDF document text
    • http://shepardfarm.com/clients/877021/File/pajovodilasu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/vowavar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cursive+handwriting+fonts+copy+and+pastePDF link annotation
    • 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

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001c192.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C192 102684 bytes
SHA-256: 9a36fe5d7abc3fc0ce9085dc040098653fa88d46ca64bef53445918c51641eff
font_00_sfnt_off00010649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10649 48060 bytes
SHA-256: c445f49f787055c84198b7c5990e1ee3fa581facd75f24ee79f5e92649a2c76c
font_01_sfnt_off0001709c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1709C 21536 bytes
SHA-256: 3028351126f87f78bd29673c418d986e732370336f1a793adceb5035dea118f3
font_02_sfnt_off0001a74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A74B 11248 bytes
SHA-256: fc85cb43f42f64d9c47b17fb2e1927aff7b1e12747dfffdfd48ee3c8be4fab9c
font_04_sfnt_off0002b98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B98E 16112 bytes
SHA-256: b571339faea2cb97d8cde8302d6d527a77dd1eff7e5a04c025bd69dbe6125fe9
font_05_sfnt_off0002e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E08C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_06_sfnt_off0002f86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F86C 1460 bytes
SHA-256: 46b20309067a4634ce0f1eff74dfaff32afbeaf606a5cf2559c39957c73678a4

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