Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5e01339dc2f21f…

MALICIOUS

PDF

70.8 KB Created: 2021-09-13 02:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0ac199513e5483419552f1174ad5461d SHA-1: b86f1332dc88aef25ea077582b3b1c83d3fb6fa0 SHA-256: 5f5e01339dc2f21fb771774c19193ad9ad42ce9dce7514311a916c2aa616dc6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised CMS upload storage, suggesting it's used for phishing or distributing malware. The presence of URLs with 'utm_term=download+gta+5+real+game+for+android' strongly indicates a lure for users seeking game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cc24439fe---18464198693.pdf In PDF document text
    • http://orosweb.hu/userfiles/file/28319712881.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/33119404652.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/luzonalajapo.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/lasofipolixufiravukuruj.pdfIn PDF document text
    • http://soc-in.com/data/media/files/daxexut.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/449412cfc4a6f166c190942ef08f8b60/xogapovemilep.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zagawuporololilozu.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/nipokubefudew.pdfIn PDF document text
    • http://usateatop.com/_upload/files/lexagofuposobeworobaluzew.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/kosuz.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/wevijito.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/23648048000.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210903142432.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/betoguzidanu.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/kixudebowet.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/99679864441.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/99162598752.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136a2a741086---43877289501.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/bufizojibufidiwopagurap.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/99043072746.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/18854974017.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/9634165258.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/83155029434.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/direrolibatujigefi.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/30471109098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=download+gta+5+real+game+for+androidPDF 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_off0000b666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE78 15224 bytes
SHA-256: 23d850aa2237cdaa14ca8b8e4f6c1ddf1b6c02b432eb9063c342371ad5b32fd1
font_02_sfnt_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 10748 bytes
SHA-256: 98938cef90a3156655722985923ab854b8bdb2e0f579a2d7eb3997b60a2df57b

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