MALICIOUS
104
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript, which is a common technique for malicious documents. It also contains numerous external URIs, many of which point to compromised WordPress sites hosting PDF files, suggesting a link farm or SEO poisoning attack. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9910
Heuristics 6
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160987111eb049---kuvebiwafelek.pdf
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a122ccdfd0a---miluzaz.pdf
- https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/s010l63d9onr9arias237s0bm7/torubaxuneki.pdf
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xabakebotizutuzixugigojid.pdf
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077f58c99ed6---64598461684.pdf
- http://baldonimarcostudio.eu/userfiles/files/bapiwu.pdf
- http://galettedesrois.hu/userfiles/file/55414855071.pdf
- http://www.startservis.sk/novy/ckfinder/userfiles/files/84458034292.pdf
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610e39ca2719a---bepojiwepetok.pdf
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/8nc6id7sv6vuocre3bamu31s3s/moguj.pdf
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116d9e033dd8---32828741596.pdf
- http://bluecars.pl/userfiles/file/xenepimup.pdf
- http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/3026245826.pdf
- https://smilaxlabs.com/userfiles/files/78967275621.pdf
- https://kitapkaplama.com/upload/ckfinder/files/vivaxa.pdf
- http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guwerosafatajopozotum.pdf
- http://www.asslar.de/downloads/38317470404.pdf
- https://travelstore.tn/userfiles/file/84686308654.pdf
- https://hinodanang.com/uploads/image/files/bodutabadufumegivonev.pdf
- http://giadinhmedia.com/uploads/files/werovasupesusotelunes.pdf
- https://prospr.fr/ckfinder/userfiles/files/pijodonubibazatagifez.pdf
- http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/sogew.pdf
- http://ysenb.kr/board/file/editor/file/dagobirakurupinu.pdf
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611592eb3956d---74561410727.pdf
- http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/kowavekozi.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=cuaderno+de+trabajo+de+matem%C3%A1ticas+5+resuelto+todo+2021
- 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000103be.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x103BE | 16792 bytes |
font_01_sfnt_off00011bd5.bind7cc9ba5a8722795e6c3e0bff5c1b65b559b0af2ef7a3ec2d002d1b6c361949d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11BD5 | 11540 bytes |
font_02_sfnt_off000136d2.bin4b9c85dfc1f3f125a092050190824a2c9168dca1cda963aec3ed62f07b921f54 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x136D2 | 18848 bytes |
font_03_sfnt_off00016644.bin505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16644 | 16100 bytes |
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