MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous external URIs, many hosted on disposable or compromised domains. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution lure, likely delivered via spearphishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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://oniceh.ru/uplcv?utm_term=social+steps+android PDF link annotation
- http://henghuitong.com/jingkelun/userfiles/files/20210910080103.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135092dcbd12---xaposudaluxexixowinabusa.pdfIn PDF document text
- http://tsraccountants.nl/mailing/images/photo/file/kejesubagezi.pdfIn PDF document text
- http://www.bluefashion.cz/ckfinder/userfiles/files/wikoxe.pdfIn PDF document text
- https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/38301800849.pdfIn PDF document text
- http://wsm.hk/images/uploadfiles/file/vixobobezokozovexeribon.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a5e84f09e5804ded5dc75722741cb1d2/21803843440.pdfIn PDF document text
- http://origo.ws/userfiles/file/vemikepiniloruwiwikenobeb.pdfIn PDF document text
- http://e-sportis.com/images/upload/gofawufimuzularameli.pdfIn PDF document text
- https://bya-ingenieria.com/ckfinder/userfiles/files/filulire.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161332fbca46a9---rupokosanizadarera.pdfIn PDF document text
- http://pegastelco.com/pictures/files/5051873592.pdfIn PDF document text
- http://taxplus.in/images/contentimages/files/dedebawigav.pdfIn PDF document text
- http://christschoolblr.in/userfiles/file/61564151116.pdfIn PDF document text
- http://trunglam.vn/uploads/userfiles/file/zapigodofugubuwobewi.pdfIn PDF document text
- http://elpijisystem.com/file/jenivuvetazoravuvu.pdfIn PDF document text
- http://honda-vo.com/upload/file/rifigubawenelawogajuj.pdfIn PDF document text
- https://hotelite.in/userfiles/file/75341648150.pdfIn PDF document text
- https://ivanamihic.com/files/rupafituxunuxe.pdfIn PDF document text
- https://network-italia.it/file/sevekujafezaraluxoxate.pdfIn PDF document text
- https://auto826.com/uploads/files/33491042359.pdfIn PDF document text
- https://pacie.vn/web/uploads/files/29197011241.pdfIn PDF document text
- https://alkirbilaw.com/userfiles/files/29413898397.pdfIn 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000df9b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF9B | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f7b2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7B2 | 10580 bytes |
SHA-256: ed9f8de697bc9e60244e0c559f0059d1fe31d4eba14132ecb96e69da5ee3098b |
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font_02_sfnt_off00010fe6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10FE6 | 17444 bytes |
SHA-256: 4af77babe1c8fb652b11a7002bcb0ea48a4ed3c64fa614ef43d1b0b3d797af45 |
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