MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 User Execution: Malicious File
The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, and the PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic highlights the use of compromised infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
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 https://cructi.ru/uplcv?utm_term=dosage+calculations+a+ratio+proportion+approach+pdf
- http://sakuragiramenandsushi.com/uploads/files/puxunibuwajo.pdf
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084215abfdfb---30215821259.pdf
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce75248af---65535047841.pdf
- http://cesnek-vysocina.cz/UserFiles/File/xidedogelalif.pdf
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f5bc0bc97---bovivavifu.pdf
- http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/29072623897.pdf
- http://aelma.com/sites/default/userfiles/file/8713233427.pdf
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cd8fdaf31---lepawubevumamuvilajisok.pdf
- https://thietkevuphong.com/uploads/image/files/51701205447.pdf
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/beturi6rg8urnhuecbrfuiomj5/tafibigakenibotojoxozu.pdf
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2daa5dd56a---66563639240.pdf
- https://congchung7.com/upload/file/67684539062.pdf
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/jejpj58apnc1kb5fln3h660hd7/megalapezamitexineritetel.pdf
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34092d5cd---72143080768.pdf
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eec02c900d---52220661195.pdf
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a0c8d227e2195812b833f4202ad4b5d6/284755358.pdf
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa3a2462b94e251af8f166546a6adae9/7280249225.pdf
- http://kco.su/userfiles/file/pirexomosemizom.pdf
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608427fe8bdd6---76149392344.pdf
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/oogutekktcec2onsjn6at084u3/13175365962.pdf
- http://thermogroup.ru/uploads/files/jububokebal.pdf
- http://domusanna.it/userfiles/files/detebalaxijow.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e504.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE504 | 16792 bytes |
font_01_sfnt_off0000fd16.bina8b0ad524c70cdfee0f8228adc42bc33c59a3b03bff485271bcf9bfa75256359 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD16 | 17328 bytes |
font_02_sfnt_off00012a95.binab1bed2b9d4557d661d88c1135a73db64b9c55ba33beba341a9455e97ab781d7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12A95 | 11000 bytes |
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