MALICIOUS
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 with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to external sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f34e9b9005731d04ac21cbd192ee04f8/43150405833.pdf In PDF document text
- https://publicbridge.pl/userfiles/file/vuralaluvupoxopikibure.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c27476c7106---53430828277.pdfIn PDF document text
- http://sunjewelsonline.com/userfiles/file/50394990653.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f7059109b94521e8d3c02058c5643dc9/96402955271.pdfIn PDF document text
- https://balbok.net/admin/ckfinder/userfiles/files/91041417228.pdfIn PDF document text
- http://nw-line.ru/generic/uploaded/22477020708.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/74987720058.pdfIn PDF document text
- https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/maijeut9sdbhjf6qtvfaiuauaf/35209036068.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6f9cf3a81---wusefuzopivoba.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f58b047af4---20835626123.pdfIn PDF document text
- https://unibel.pl/pliki/upload/file/kuribiwekaxelufakufesa.pdfIn PDF document text
- https://briljant-maleri.se/UserFiles/files/22840483242.pdfIn PDF document text
- http://daydala.com/userfiles/file/vorepuz.pdfIn PDF document text
- http://kondicionery-ivanteevka.ru/upload_picture/file/furediv.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160760874ea810---kajijuzafoxukudux.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/74e4f0682ad34592dc24727bf05b2a59/dupiwazi.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a954aca64d4---59850336617.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=sample+letter+waiver+of+penalty+for+reasonable+causePDF 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00013222.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13222 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00014a34.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14A34 | 19336 bytes |
SHA-256: cfaea0daae4d28e2fb7b4908f9eff165f57e3a5da0d46dc95798e5a63bc645c7 |
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font_02_sfnt_off00017ceb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17CEB | 11220 bytes |
SHA-256: 8d02f94a37ac3a8ee9be699abfd65754dfe9928fdd1dc09b62b70e63bb53c784 |
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