MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to deliver a second-stage payload or conduct phishing, likely initiated via a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9961
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d78890931---72874758727.pdf
- http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/32365882860.pdf
- http://rotarylaspalmas.orgdocumentos/file/fisozobu.pdf
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82d36b948---89114379411.pdf
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071834c5b898---perawitoputorajikifawa.pdf
- http://sosnovgeo.ru/userfiles/file/xonivujoda.pdf
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a780517c1ee---subatelomejobajerowanezu.pdf
- http://phuocthuan.vn/images/pic/file/44426049416.pdf
- http://staresecurity.com/userfiles/file/wuvefa.pdf
- http://fine-cottage.ru/userfiles/file/sojatudejukinubufelis.pdf
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/99823fbc3950d15e297b09e39370acb6/tegavasaz.pdf
- https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a23f111bb4bb057979fdd199bd11aea8/51009707027.pdf
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5743170a96---57200665222.pdf
- http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838860a91ba---32973683951.pdf
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b54e0c1d75---86962462207.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4ffc43b36---43377486343.pdf
- https://myphi.biz/nbloom/fckuploads/file/88031343048.pdf
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/oscebial51bpcn85dtrdu8jo6u/kazenuk.pdf
- http://brianhaymore.com/images/e/file/luwakawowiputekolenuv.pdf
- http://kadh.kr/bobod/upload/file/65301022045.pdf
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b8b791a6f---89071553311.pdf
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5446130f74---18259191440.pdf
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/8k7milga2sg5ot2eacmk2g189v/kekenujedomurogak.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=oh+no+punctuation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00018fba.bin638b17b113ee273815c1f8b95a64b9ca24e1a8cdc7e52842d715310f6bcb7164 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x18FBA | 19264 bytes |
font_01_sfnt_off0001c2f9.binba2aff8d6e0db36a0d84bf06b4745c65790261d2a6fd917a7f5114b88f74d03d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1C2F9 | 10152 bytes |
font_02_sfnt_off0001d99d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1D99D | 16792 bytes |
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