MALICIOUS
146
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was flagged by a machine learning classifier and ClamAV as malicious, with specific heuristics indicating it is a callback phishing lure. The document body is heavily obfuscated, but the presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a link farm or phishing infrastructure. No scripts were extracted, but the PDF structure and heuristics point towards a phishing attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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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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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/49801307077.pdf In PDF document text
- http://architettobotteonpierpaolostudioabacus.it/userfiles/files/novugexabemutare.pdfIn PDF document text
- http://magyaringatlanadatbazis.hu/dev/_user/file/kiwuzedafasozafijipatini.pdfIn PDF document text
- http://diplomat2014.ru/ckfinder/userfiles/files/8421722304.pdfIn PDF document text
- http://tns-china.cn/editor_upload_image/file/33402283083.pdfIn PDF document text
- http://haiphongcontest.com/images/files/soripa.pdfIn PDF document text
- https://lyna-garage.com/htdocs/cljr/data/files/dopadulukosawesosoz.pdfIn PDF document text
- https://armenia4d.com/contents/files/fowidanasuniwukegejijeves.pdfIn PDF document text
- http://schokoladenfontaene.de/idata/47379516221.pdfIn PDF document text
- http://solemarservizi.it/userfiles/files/fujagelos.pdfIn PDF document text
- http://floridare.ru/app/webroot/img/uploads/file/365504_pafopukimid.pdfIn PDF document text
- https://ccenter.ro/userfiles/files/pivuxilelufetokasuzud.pdfIn PDF document text
- http://luxcottage.ru/stroykamen/userfiles/files/wigaseko.pdfIn PDF document text
- https://sma-dfgg.org/site/admin/file/69060076781.pdfIn PDF document text
- http://ybshajiang.com/userfiles/file/2021-09-06/210906235432595889vlz7sae8yxhe.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ql6dunoar2vdpts9938glj1vfg/tulemamopoberixodo.pdfIn PDF document text
- https://sportscientistsviews.ijmsir.com/ckfinder/userfiles/files/sumalidozek.pdfIn PDF document text
- http://detaycopymatbaa.com/userfiles/file/mamunolofikajux.pdfIn PDF document text
- http://kimsanghun.com/upload/userfiles/file/20219221550103244.pdfIn PDF document text
- https://phukienbep.net/media/files/vasezofeperevidudof.pdfIn PDF document text
- http://excitechem.com/userfiles/file/zuxomoxor.pdfIn PDF document text
- https://partnyor.az/userfiles/file/furiledinaxedadubu.pdfIn PDF document text
- https://springkasteelhuren.be/userfiles/file/mazesusiromufogegef.pdfIn PDF document text
- http://kim-clark.ru/files/file/tasamef.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+remove+the+google+account+from+android+phonePDF link annotation
- 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_off0000b2ef.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB2EF | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000cb01.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB01 | 14632 bytes |
SHA-256: 11c53f304fdece859c25863bb06d4f4bb384933e83ba6a7a6928eca063a1f8b5 |
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font_02_sfnt_off0000efc3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEFC3 | 11140 bytes |
SHA-256: 4ca2dae7618a7ac3aecaa3cf33081738660d70ea97faacccfb6924e29d43a76e |
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