MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file contains a link farm, a common technique used to redirect users to potentially malicious websites. Several heuristics indicate that the PDF is designed to host a large number of links, many of which point to compromised or disposable hosting. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is part of a malicious campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9950
Heuristics 5
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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://tjchenxing.com/filespath/files/20210902041219.pdf In PDF document text
- https://cyberbirddog.com/userfiles/files/64594467747.pdfIn PDF document text
- http://theprofitnesstrainers.com/userfiles/file/6868501928.pdfIn PDF document text
- http://rajskiewakacje.pl/userfiles/file/91645538627.pdfIn PDF document text
- http://cuboni.com/uploadfile/hong202109041905058226.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc57be6e2d---jawawujewufobekaside.pdfIn PDF document text
- http://bodemveenweiden.nl/bodem-veenweiden-img/fimisazunajerigi.pdfIn PDF document text
- http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72145331247.pdfIn PDF document text
- https://santa.my/images/users/00000000/files/rokomugigerivubolokaf.pdfIn PDF document text
- http://danangsculpture.com/uploads/image/files/tosupejimagozovetujasup.pdfIn PDF document text
- https://12tiga.com/contents/files/95122489185.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/likafebi.pdfIn PDF document text
- https://afra24.com/basefile/afra24/files/besezovutal.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/21f206b76675c7052b60e53ac6fb32e1/75173450498.pdfIn PDF document text
- https://drivetripper.com/userfiles2020/files/jabovaduvakakalanija.pdfIn PDF document text
- https://testgit.begurholidays.com/uploads/userfiles/files/wilegesotemifokebunet.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613404e0e109d---97910319430.pdfIn PDF document text
- http://iweldbot.com/ckfinder/pho/files/rololizevafe.pdfIn PDF document text
- http://xdata.pl/app/webroot/img/ckf/files/mujagu.pdfIn PDF document text
- http://euroteam.vn/ckfinder/userfiles/files/zokefegatana.pdfIn PDF document text
- https://blokhol.com/upload/files/tesol.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ohjl1vhoppnh7qchdhbnnt3i91/98590455352.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/161338e7667a74---51334270635.pdfIn PDF document text
- http://ladyvenus.it/userfiles/files/5115927172.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6d301524---41040230239.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=family+and+marital+counseling+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_off0000b2fb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB2FB | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000cb12.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB12 | 11156 bytes |
SHA-256: da8f4267bfce2f5794f4345c2a1a799a0ca10d81774ef8f4ac5cadffc74618b1 |
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font_02_sfnt_off0000e4ea.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4EA | 14628 bytes |
SHA-256: b259f647ed08abb28055331d8c97911a8f74f2aaac3b85cd4db08f6cf6925a37 |
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