MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised CMS upload storage. The document body is unreadable, but the presence of numerous URLs, many hosted on potentially compromised WordPress sites, strongly suggests a phishing or malware distribution attempt. The primary goal appears to be directing users to external, malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9952
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 http://cnokorea.com/userfiles/file/86487556735.pdf In PDF document text
- http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16084b961b2e13---94278371902.pdfIn PDF document text
- https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/9d4ee8d75be08a9eb1d86e6ad1dfa243/memafemeko.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc064fd33db---1310982731.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d3caad4c3b3---48330735511.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d078c50554d---kiriwutumuneg.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160afb93549b06---gonexagipinugimepadara.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/9765506901.pdfIn PDF document text
- http://magogaralbamoble.com/galeria/files/xogajapaja.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/6f5d1643a7892667ad85ffcc81e87a0a/94053036401.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739b5dbc1ca---3447731365.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe82eb3fe---tuvakarawoso.pdfIn PDF document text
- http://frangarcia.eu/upload/file/37215385712.pdfIn PDF document text
- http://automsystem.com/UploadFile/file/20210628211002966.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/662d591b96e69bc438cd507c3d00cc85/keluzubuwebalavivijezi.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/t4k9ot50dghhj6rn6apralvp92/51804761903.pdfIn PDF document text
- https://shiokuda2.com/contents//files/malujivizasif.pdfIn PDF document text
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/5jqfhq8glo1ikvl02bk8pg4c33/11022497751.pdfIn PDF document text
- http://cedule-plachty.cz/files/file/56392485111.pdfIn PDF document text
- http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48205095141.pdfIn PDF document text
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/026bb19639d6805cc0a0790991386feb/xowujodevi.pdfIn PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ac23656cd1c23e38ad8b9dea19bc4701/11066942043.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/pagunapogexezawojelor.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=always+imposter+hack+among+usPDF 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_off0000f646.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF646 | 11192 bytes |
SHA-256: 07cf0483a311560278b4301aada30d9285ad65bac2ece1aa4fe272aa80fe5c34 |
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font_01_sfnt_off00011067.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11067 | 17408 bytes |
SHA-256: 68bb115337a3004c9c4ee352d87bde86c5230fe4522a3fc0fe4bda4b98ac2f71 |
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font_02_sfnt_off00013d8b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13D8B | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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