MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, which identified it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be acting as a link farm to redirect users to potentially malicious sites, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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 https://smidgel.ru/uplcv?utm_term=vpn+china+mod+apk PDF link annotation
- http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/52945636201.pdfIn PDF document text
- https://alkoplast.rs/files/72083407384.pdfIn PDF document text
- https://apz-arte.com/ckfinder/userfiles/files/mikawosigum.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161339be06f973---40061475421.pdfIn PDF document text
- http://avs-market.ru/admin/ckfinder/userfiles/files/nilovut.pdfIn PDF document text
- https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/duxanowaluvu.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161340f3720dae---zadokixad.pdfIn PDF document text
- https://mingyi-lock.com/data/file/userfiles/files/74467346583.pdfIn PDF document text
- http://srmtteaparty.com/uploads/files/202109012215576787.pdfIn PDF document text
- https://khoahoc.timviec365.com/picturesfiles/53518613496.pdfIn PDF document text
- http://mwbright.com/upload_fck/file/2021-9-7/20210907235914816074.pdfIn PDF document text
- https://nisahanpin.com/calisma2/files/uploads/vakan.pdfIn PDF document text
- http://patrick-vallot.com/upload/files/88342303514.pdfIn PDF document text
- http://lagrupacio.cat/file/92119685053.pdfIn PDF document text
- https://udruga-invalida.hr/files/27900930030.pdfIn PDF document text
- http://elliptical-trainers.ru/ckfinder/userfiles/files/gadakudumoj.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/54bda8cb3d6287ce508b78288812d8d3/nupafujo.pdfIn PDF document text
- http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/vemulu.pdfIn PDF document text
- https://wupaojichangjia.com/d/files/bidamejesuze.pdfIn PDF document text
- https://educhina.mn/editor/files/xibumagilupajefaripipeg.pdfIn PDF document text
- https://satbietthu.com/luutru/files/65231871591.pdfIn PDF document text
- http://teusz.pl/UserFiles/file/kebutamomidurire.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://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_off0000b709.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB709 | 17876 bytes |
SHA-256: 60ae35421d5812655424f28bc963b23c28139c58dfcdc4a47fa6d6c76c4e4bed |
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font_01_sfnt_off0000e424.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE424 | 10296 bytes |
SHA-256: be3e217fb3dee7b4cd0e3484c4ebf8fee2d4515a5027fde31e0e1fe31379bae4 |
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font_02_sfnt_off0000fb15.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFB15 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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