MALICIOUS
146
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating a malformed exploit stream and a link farm on disposable hosting. The PDF contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence the T1059.007 technique.
Machine Learning
- Nyx PDF Classifier malicious score 0.9950
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://archism.ru/uplcv?utm_term=juegos+de+carros+de+carreras+para+android PDF link annotation
- http://jsdarvin.com/files/jikabiritiparogavirubek.pdfIn PDF document text
- http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/kagodobokuguzabipogekuvor.pdfIn PDF document text
- http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109120022589102.pdfIn PDF document text
- http://dynamicyunnan.com/ckfinder/userfiles/files/12597116464.pdfIn PDF document text
- https://al-farh-iq.com/upload/userfiles/file/96412058778.pdfIn PDF document text
- http://touristclub.in/userfiles/file/46108559664.pdfIn PDF document text
- https://tanthueviet.vn/img_data/files/1063025469.pdfIn PDF document text
- https://torgradio.ru/new/files/file/47069274002.pdfIn PDF document text
- http://lightofislamonair.org/uploads/files/8095405634.pdfIn PDF document text
- http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/fegijagunuwenirivovanumi.pdfIn PDF document text
- http://sitoad.com/bbqjoekey/files/202109030529185977.pdfIn PDF document text
- https://schachverein-marchhoefe.ch/fcsr/news/upload/file/78912991537.pdfIn PDF document text
- http://czerwoneiczarne.pl/files/file/rinobojikinikabozojino.pdfIn PDF document text
- https://hideab.se/tc/Mediagalleri/file/78973109129.pdfIn PDF document text
- https://everywheregenes.com/uploadfile/qu26_qu106_com/files/pazevokezobasu.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613753ee7eb04---kagemagu.pdfIn PDF document text
- http://wu-pao.com/upfiles/editor/files/supeleriwilo.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/5460870257.pdfIn PDF document text
- http://harnettcountyhba.com/userfiles/file/30252391746.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139409d2b76e---nobakaxis.pdfIn PDF document text
- http://praconsulgroup.ru/pict/file/5760562495.pdfIn PDF document text
- http://oaklandscreche.ie/userfiles/files/27385534894.pdfIn PDF document text
- https://arslanemlak.com/E/file/In PDF document text
- http://photonart.nl/phpcmsys/file/76470847683.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://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_off0000c5e0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC5E0 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000ddf7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDF7 | 10636 bytes |
SHA-256: 2badad128e7141ac609326a3509d50cd84d3c1c27afb6c2375bc272afbbc0971 |
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font_02_sfnt_off0000f62e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF62E | 18500 bytes |
SHA-256: dd330a5c5c7ed27f42af93bd60d2ac7750d5772bb56090068c9187db2a70dc60 |
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