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. It contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to redirect users. The document body is heavily obfuscated, preventing a clear understanding of its direct intent beyond acting as a lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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://yenhuy.vn/upload/files/69594479822.pdf In PDF document text
- https://airflow-skateboards.com/upload/file/raxana.pdfIn PDF document text
- http://freewest.at/99237047956.pdfIn PDF document text
- http://kibunajcc.com/ckfinder/userfiles/files/98686631977.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1fc24d93f---jijirazu.pdfIn PDF document text
- https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331baa3c95e---begemalojosuniteruf.pdfIn PDF document text
- http://mindentudor.hu/userfiles/file/17512411629.pdfIn PDF document text
- https://serpavenger.com/ckfinder/userfiles/files/gazuba.pdfIn PDF document text
- https://efckrakow.pl/userfiles/file/zeneju.pdfIn PDF document text
- https://vantainoidia.vn/ci/userfiles/files/duzojipisirijiw.pdfIn PDF document text
- https://sydneystudytour.com/accounting/userfiles/file/33007131734.pdfIn PDF document text
- https://cplastik.cz/data/cms/file/70513218222.pdfIn PDF document text
- http://sarkar.ie/userfiles/file/dinaravejegotabudoxo.pdfIn PDF document text
- http://hoilhpnqbthanh.com/upload/file/bisoxajibinovare.pdfIn PDF document text
- http://duythuc-bearing.vn/uploads/userfiles/file/33162813324.pdfIn PDF document text
- https://pianoinprimopianofestival.com/uploads/file/lavetakumusip.pdfIn PDF document text
- http://begues.mobi/userfiles/file/33941385986.pdfIn PDF document text
- http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/movojakinotukimibalap.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/5bb5aef73595a1ae241d2c574ac4d989/kokufotebun.pdfIn PDF document text
- https://bachson.net/upload/file/49755224917.pdfIn PDF document text
- http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/fijozogoxorifajudagage.pdfIn PDF document text
- https://poolpoint.be/uploads/file/2000121267.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=kamsutra+full+hd+moviePDF 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_off000102bd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x102BD | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00011ad4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11AD4 | 10672 bytes |
SHA-256: f0e9582782cb8fcf445b1d8fda11a79f3d5f4924e5777b4ad5a2264029e3727f |
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font_02_sfnt_off00013346.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13346 | 17228 bytes |
SHA-256: 4e6ecbe85584c859088a17af0dbe1657d4717df775a92ff022ea5f99052af11a |
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