Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e46847cd3fdaaa…

MALICIOUS

PDF

79.2 KB Created: 2021-09-07 21:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f9e326943c4151cd5825b3eb993e9961 SHA-1: 56ac29da225de10756e7d1c3027582ca29ff582e SHA-256: 84e46847cd3fdaaaad6c37365ab44843eadd35a13350b0cbc88dfad6c2078c41
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely involving external redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://springkasteelhuren.be/userfiles/file/tudidomili.pdf In PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210829_160829.pdfPDF link annotation
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6953952876---30684887048.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/molebogoniv.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4d820d702ce60344e7f6a7346baea8e1/11457089763.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/16877593113.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5626349a10---15147370064.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/57481221825.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/a8514f237b6756a1fb37c58b271914b3/45176451957.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/57519117653.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/57320941306.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/entnjuhdroabiiq0g04clenfv6/jumejokixijidurivunil.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/38799630165.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b272b58bb62---nodupodi.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/81687074245.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/subosufeg.pdfIn PDF document text
    • https://buka.ru/sadm_files/39926845056.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/linamukorozufavozalel.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5a45a559046c63768faba7e0a4fbade8/zereporix.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073af3db5b66---juzaw.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/gizezazaxelupivuvazivosi.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/97834899491.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/jowupamewolotexen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=delitos+fiscales+pdfPDF 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_off0000d370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD370 17604 bytes
SHA-256: 4e91903cb864276e96009b9d495c74c4e3bfdbaf58e5b745fa5014d57ee811dc
font_01_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 10412 bytes
SHA-256: db3787f8f27d0be4939f07cf86cc48108292976b7e84bb736c44f3bd80587825
font_02_sfnt_off000117a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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