MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution lure. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, pointing to an attempt to redirect users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9666
Heuristics 7
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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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://krisoc.ru/uplcv?utm_term=%D8%A7%D9%84%D9%85%D8%B5%D8%AD%D9%81+%D8%A7%D9%84%D8%B4%D8%B1%D9%8A%D9%81+pdf+%D8%AA%D8%AD%D9%85%D9%8A%D9%84 PDF link annotation
- http://fmi.lu/userfiles/files/navakuxelulevizuvav.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cad7479bb---dapes.pdfIn PDF document text
- https://idd.no/ckfinder/userfiles/files/10716536354.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a12d1842294---80812458179.pdfIn PDF document text
- https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/31395123766.pdfIn PDF document text
- http://xn--80aab8aioy.xn--p1ai/userfiles/file/23578134920.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4fe36c1f---62575937453.pdfIn PDF document text
- https://wfbulgaria.com/uploads/wysiwyg/files/7991268051.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ee10bc91f---bimala.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119fbe25308d---62749788638.pdfIn PDF document text
- http://briarcliff68.com/clients/71184/File/2096439847.pdfIn PDF document text
- https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/da4ac7d0aef04c213bd519f02822f6c2/87017815237.pdfIn PDF document text
- http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ffa0055b2---687481017.pdfIn PDF document text
- http://palazzodiaz.com/userfiles/files/77686872742.pdfIn PDF document text
- http://inruho.ru/ckfinder/userfiles/files/fexudu.pdfIn PDF document text
- https://ambulatorioveterinariosismondi.eu/file/55057821293.pdfIn PDF document text
- http://synergyproperty.com/images/files/bubidefararobizevuga.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160834fced809a---gogetakisitol.pdfIn PDF document text
- https://pinkrali.com/calisma2/files/uploads/28635180925.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/aj73qrcltqgcn4lo4eaah5qg9r/19196042672.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f6a5cfb88073d7de62c1d2486c02c213/39494677123.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083d6aa6c4fb---masok.pdfIn PDF document text
- https://next-engineering.com/userfiles/files/kuwufezuj.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/78067998676.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607133dd990f1---29968011118.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b606971b85---11711027785.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_006_off00017c93.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x17C93 | 28580 bytes |
SHA-256: 537c5a2e03142823a73916c34fa71383d31705e22fc8c2f134bc7b064441032d |
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font_00_sfnt_off000113a3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x113A3 | 18260 bytes |
SHA-256: bb21efd43763ab8faf7ef4010626b18613f312fd96f1a00be769603861df5324 |
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font_01_sfnt_off000130b1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x130B1 | 9372 bytes |
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724 |
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font_02_sfnt_off00014490.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14490 | 22084 bytes |
SHA-256: 49ec00bfc27207dcda7c26578eec44a54c2206eadec932bcdeb31379d2503a73 |
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