MALICIOUS
146
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file exhibits characteristics of malicious activity, including a malformed exploit stream and a high ML classifier score. The document body, though heavily obfuscated, suggests a lure related to educational materials. The presence of numerous external URIs, many hosted on seemingly legitimate but potentially compromised domains, indicates an attempt to redirect or download further malicious content, aligning with a phishing or exploit delivery pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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://www.osgeurope.com/sites/osg-corporate.dev/files/webform/27880179426.pdf In PDF document text
- https://ambrose.edu/sites/default/files/webform/93854264345.pdfIn PDF document text
- https://www.dgs-interparts.be/sites/default/files/41094691834.pdfIn PDF document text
- https://www.dgs-interparts.be/sites/default/files/bipaxuvimul.pdfIn PDF document text
- https://architecturaldesigninc.com/sites/default/files/sujuxot.pdfIn PDF document text
- http://spotlight-sites.com/sites/default/files/webform/razodogodipuvubetixem.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/65047245793.pdfIn PDF document text
- http://pilgrimland.com/sites/default/files/webform/resume-uploads/woluweweketasuzizolog.pdfIn PDF document text
- https://www.visitsavannah.com/sites/default/files/webform/90994069376.pdfIn PDF document text
- https://www.a1touchsolution.nl/sites/default/files/xofarazenufokedakuzos.pdfIn PDF document text
- https://www.jwico.com/sites/default/files/webform/23528315583.pdfIn PDF document text
- http://www.guninetwork.org/system/files/webform/heirri_proposals/wozat.pdfIn PDF document text
- https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/bugoxugokerudanetisene.pdfIn PDF document text
- http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/gurolaxi.pdfIn PDF document text
- https://vectorcorp.net/sites/default/files/webform/resume/danodajanenalidadalibebav.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=libro+de+historia+de+mexico+tercer+grado+de+secundaria+editorial+trillas+pdfPDF link annotation
- https://www.healthdata.org/sites/default/files/resumes/18848190838.pdfIn PDF document text
- https://www.vub.be/sites/vub/files/webform/rifavuzido.pdfIn PDF document text
- https://campusrec.princeton.edu/system/files/webform/rilawadabovoxilezevateg.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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00011fd4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11FD4 | 3312 bytes |
SHA-256: cb5c8c6405a97e289a1d37fd8f3fa0fb9a9e5cd02c3f475be668e5c7f8c23a8c |
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font_01_sfnt_off00012bb5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12BB5 | 5716 bytes |
SHA-256: b1ccd38efb1729e800d5f8de9a696fbd8a0da484fda55f640df73e624d5606f4 |
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font_02_sfnt_off00013f06.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13F06 | 13264 bytes |
SHA-256: 2e1d49b1a40f103a3c45eec5d71f0108f31aebf49016128a574f316d2f0e2039 |
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