MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 7
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://irlanc.ru/uplcv?utm_term=junqueira%2527s+basic+histology+14th+edition+pdf+free+download PDF link annotation
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e829863c8f---27086829489.pdfIn PDF document text
- http://proxima-design.cz/files/file/80212001379.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/e0a1ce82476ce189798955ea5244d6e0/86015283223.pdfIn PDF document text
- https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/898267f3ee52e189be54008c2849650c/mezimiwo.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/6c6721c93df41ce242bfd36a19b12cc3/xokarewusalazala.pdfIn PDF document text
- http://doo-san.com/userfiles/file/20210508062016.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/fadotemuxinubarosimitol.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097038f664d9---32609941194.pdfIn PDF document text
- http://rialta.ie/userfiles/files/22703461962.pdfIn PDF document text
- https://cavalier-hundezucht.ch/userfiles/file/91450165792.pdfIn PDF document text
- https://atl-50.com/files/file/85462963220.pdfIn PDF document text
- http://pressvaluation.net/userfiles/file/53897338646.pdfIn PDF document text
- http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/tijokinoremanadatas.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a188c3aa742---kabanuzi.pdfIn PDF document text
- http://xn--2-140-swe8h.xn--p1ai/files/kagakukifeji.pdfIn PDF document text
- http://say-international.eu/userfiles/file/46410003822.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000de7b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE7B | 6040 bytes |
SHA-256: 8f6a33c31af64ad390e151c16b80698c12b4863ea7601b4aa731c9a98d3ec489 |
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font_01_sfnt_off0000f319.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF319 | 1800 bytes |
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0 |
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font_02_sfnt_off0000fba7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBA7 | 11188 bytes |
SHA-256: da45de1ec159901e9ca6cbf003360044e86378986a76c58734eeaf180708cffc |
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