Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e5a9694cc5cd62…

MALICIOUS

PDF

252.8 KB Created: 2021-10-11 05:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f9c4741efaae12bc12cb98d10053782f SHA-1: 74c8c8f8b1c40914873391d031aab7391e9aaaf3 SHA-256: 29e5a9694cc5cd62960a764d4e202c271804a292f9a065cc76e99410d929facf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains multiple links pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings point towards a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

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 https://pediatricpotentialsnj.com/PP/PPpng/files/rakumolopalumapobopajir.pdf In PDF document text
    • https://kawanmto.com/contents/files/85572187574.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/mexijap.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/69484834183.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba70b5f3d0---24520779926.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210904202830.pdfIn PDF document text
    • http://3234.us/data/attachment/file/6995753662.pdfIn PDF document text
    • https://baongochoa.com/upload/file/33568941438.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/73561262890.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/degisuvitimu.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/nurag.pdfIn PDF document text
    • http://juentai.com/userfiles/files/38128879971.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/38578564320.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/tugavoteduwomudukimiz.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/tawokowotin.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/fikonesowof.pdfIn PDF document text
    • http://dungculamdep.com/fckeditor_userfiles/file/pajetuzazifogobene.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/59369080689.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/ginasazatanokiworo.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/kp65mcm8d62csl9h91bram1mui/rerinosonir.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/pujakadexemubawi.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1613c96d0a5b95---39069433807.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/56360584668.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/lirisopasodomumebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=snoop+dogg+it%27s+the+double+gPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00037743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37743 22888 bytes
SHA-256: e1322fef693de91e79d818a2b608eb0bb131ab7930f3bc4ff705ca332e83ab04
font_01_sfnt_off0003b384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B384 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003cb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CB9B 10756 bytes
SHA-256: b377c528388bbc1794407833a16e3e53870d7e599b7d088ee40f9ee94dee301a