MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URIs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of external URIs and link farms points towards a phishing or malware delivery campaign, likely initiated via spearphishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9930
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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Clickable URI points to raw IP address medium PDF_URI_IP_LITERALPDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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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://catamma.ru/uplcv?utm_term=algebra+addition+and+subtraction
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a338585d755---46372346746.pdf
- http://radio-salsa.com/php/rs/filesupload/file/21954070223.pdf
- http://upbfassadenbau.com/upload/file/zazad.pdf
- http://sns.hu/_user/file/rutavukijapekiluzenere.pdf
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/v6kjgda66jmt02fmm1hcd8vlr4/rubunisena.pdf
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/64vlg80293bmpg0i1nl6uq4s94/28366870012.pdf
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/25801717969d1815cf4e2df17848feaa/saxefagubigotozokulolo.pdf
- http://thuephotocopytaihanoi.com/upload/files/55362616862.pdf
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bd61df948e4---18513579163.pdf
- http://pospatrans.cz/UserFiles/File/60311630704.pdf
- https://stancijanegrin.com/UserFiles/files/67452674839.pdf
- https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2b164989f---ropixepekerit.pdf
- http://brezov-gaj.si/uporabnik/file/36482064459.pdf
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/38e94cc8363d486ed8ad31ae632d406f/89485375102.pdf
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a345e105809---14613728058.pdf
- http://china-engine.net/ckfinder/userfiles/files/65271854305.pdf
- https://xo-sound.ru/userfiles/file/nujeziposifajowatoke.pdf
- http://yizhu580.com/ckfinder/userfiles/files/54017205051.pdf
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/d43s4a91jdo59rbo9gd1e18vqi/59817222140.pdf
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15b3c14930---zuripagesifowugonexanomub.pdf
- http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/79c2db6fb63614f01c0cdaccd0c75958/63456317852.pdf
- http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607c50f4dac01---fesugarinas.pdf
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/786308cb726c08cf1bae41cf2c4e980f/51556882055.pdf
- 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_off0000d413.bin1bb543891201b86cb218c82ce0c1e431878b85d3145a79f40ea94bf38162e691 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD413 | 16144 bytes |
font_01_sfnt_off0000e96f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE96F | 16792 bytes |
font_02_sfnt_off00010186.bincd6f78b310f2dc664835e597963ba6de6cd82c08eb459983ed4d554c89ee769c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10186 | 10764 bytes |
font_03_sfnt_off00011a37.binea695ec310f7e9f7e2aaf5a65e82986e5202c272c7c701776be943e45ed4a4e3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11A37 | 15712 bytes |
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