MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure suggests a lure to external, untrusted resources.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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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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 http://whdhgs.com/uploads/file/20210926143305160.pdf In PDF document text
- http://poliinc.com/upload/files/46585928822.pdfIn PDF document text
- http://theemasternetworker.com/ckfinder/userfiles/files/77743019955.pdfIn PDF document text
- http://xn--krmer-dnnebacke-1kb72b.de/files/file/98921173943.pdfIn PDF document text
- http://cssh.es/img/file/77647679869.pdfIn PDF document text
- http://88cpap.com/userfiles/files/35663768384.pdfIn PDF document text
- http://clinicaveterinariabilancino.it/userfiles/files/gidafawuremumojimozo.pdfIn PDF document text
- http://sotel-perm.ru/site/file/gubimatejivopituwej.pdfIn PDF document text
- https://alpinebadmintonacademy.com/ckfinder/userfiles/files/tuguxifigagezot.pdfIn PDF document text
- http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_21_01_29_48_4855.pdfIn PDF document text
- https://concurs-euclid.ro/upload/fck/boreduzudag.pdfIn PDF document text
- http://centralcogtc.com/uploads/file/muxukodavowumapogatuzupiz.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/10699845091.pdfIn PDF document text
- http://adas-muko.pl/photo/file/bikinab.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615177b55ef87---71601508027.pdfIn PDF document text
- https://kisikana.hr/UserFiles/files/68116393391.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161369ac5615a7---79241576677.pdfIn PDF document text
- https://onsale.social-push.cc/data/fckeditor/files/xarugosojusozujusu.pdfIn PDF document text
- https://doublehaircenter.com/upload/ckfinder/files/matejuba.pdfIn PDF document text
- http://anaminfo.com/attachfile/file/zorubafumosafajatit.pdfIn PDF document text
- http://haozuowenwang.com/imagefiles/file/fivasalujigug.pdfIn PDF document text
- http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/65982369558.pdfIn PDF document text
- https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/jrk0c2oilpegoc6fju5ck2l4ob/rufogek.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457d797a641---furijabubepegid.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=low+fodmap+grocery+list+pdfPDF 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_off0000afd6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAFD6 | 14836 bytes |
SHA-256: fda993425db7f23b939d5d9122a49dc9d4cd93662ec319bfc063110d7e45365a |
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font_01_sfnt_off0000d537.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD537 | 11016 bytes |
SHA-256: 0e34a135ddf7f866a7c698c435177750e231dbac923b586b129789236f278a3f |
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font_02_sfnt_off0000eeb9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEB9 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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