MALICIOUS
214
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1539 Steal or Harvest Credentials
T1027 Obfuscated Files or Information
This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and credential harvesting campaign. The embedded JavaScript and the document's instructions to disable security software and provide a one-time code strongly suggest an attempt to bypass security measures and steal user credentials or session tokens. The numerous external links, many pointing to PDF files on distinct hosts, indicate a link farm designed to obscure the true malicious destination.
Machine Learning
- Nyx PDF Classifier malicious score 0.9966
Heuristics 8
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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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Security software disable instruction high SE_SECURITY_BYPASSDocument instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
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MFA / one-time-code harvesting lure high SE_MFA_LUREDocument asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://doctorchina168.com/upload/files/xawusuvasifojokuvakozake.pdf In PDF document text
- http://tw-jia.com/uploads/files/202109012217036693.pdfIn PDF document text
- https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/pobowafexo.pdfIn PDF document text
- http://kite-surf.sk/files/6171724854.pdfIn PDF document text
- http://madmojo.com/fckupload/file/95321677312.pdfIn PDF document text
- http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/68313693590.pdfIn PDF document text
- http://www.de.ruben.pl/ckfinder/userfiles/files/jonifak.pdfIn PDF document text
- http://psychologkmalinowska.pl/ckfinder/userfiles/files/lejepaduzapipukapimubub.pdfIn PDF document text
- http://baltic-rt.ru/ckfinder/userfiles/files/1252394973.pdfIn PDF document text
- https://isagrinio.gr/userfiles/43837346286.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/fizavixivowubitevezotabok.pdfIn PDF document text
- https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/58593161421.pdfIn PDF document text
- https://remont-bez-zabot.ru/files/file/976032595.pdfIn PDF document text
- http://a9188.com/upload_files/art_files/files/20210906_162920.pdfIn PDF document text
- http://isotech.si/uporabnik/file/79993613181.pdfIn PDF document text
- https://heart-calligraphy.com/uploads/files/202109011727351346.pdfIn PDF document text
- https://sunriseinnjasper.com/nbloom/fckuploads/file/44227070431.pdfIn PDF document text
- http://argol-editions.fr/userfiles/file/84142219910.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9d203aacf---poxak.pdfIn PDF document text
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/4b30270a7e757ded9b71cf5f6c2ba51a/35749994803.pdfIn PDF document text
- https://resttour.com/images/userfiles/files/fekodegafe.pdfIn PDF document text
- http://xn----7sbev0bhje.xn--p1ai/images/news/file/79201756370.pdfIn PDF document text
- https://webmakler.org/userfiles/file/8231104783.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=mi+account+unlock+with+unlock+codePDF 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_off00012b7a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B7A | 10472 bytes |
SHA-256: cf84a48044b1bb5afbdea14d695a07d41b22b1519b8dce4b2c6458830df853c0 |
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font_01_sfnt_off0001433d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1433D | 21096 bytes |
SHA-256: 1491e099bc5e0ce89e9b4ad323d38389aba44de7878a80af7aa36edf493c5c42 |
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font_02_sfnt_off00017b7d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17B7D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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