MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The presence of numerous external links, many pointing to disposable domains or using UTM parameters, suggests a link farm designed to obscure the ultimate destination. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The primary attack pattern involves luring the user to download further malicious content via these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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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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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Urgency / deadline lure low SE_URGENCY_LUREDocument contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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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://anctools.com/ckfinder/userfiles/files/22491988218.pdf In PDF document text
- http://mikllc.mn/uploads/files/rudipepivosigulegino.pdfIn PDF document text
- http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/lizawuzefonebov.pdfIn PDF document text
- http://chinastom.ru/userfiles/file/kakipaxutasuk.pdfIn PDF document text
- http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/46503918694.pdfIn PDF document text
- http://bdsductri.com/upload/files/serobakezekuto.pdfIn PDF document text
- https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/q2p7r8buncablh7rd392e8t20h/56399207477.pdfIn PDF document text
- https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/panarita.pdfIn PDF document text
- http://yenidenyuzlendirme.com/ckfinder/userfiles/files/39782912546.pdfIn PDF document text
- http://christschoolblr.in/userfiles/file/33547337477.pdfIn PDF document text
- http://tsraccountants.nl/mailing/images/photo/file/kejesubagezi.pdfIn PDF document text
- http://biurod9.pl/public/userfiles/file/mafutivutafevebifozu.pdfIn PDF document text
- https://pastelbuilders.com/userfiles/file/xabesozikixivok.pdfIn PDF document text
- http://purel-biopharm.com/upload/files/zevised.pdfIn PDF document text
- http://aan.kz/ckfinder/userfiles/files/wobukonosoxiwivowilo.pdfIn PDF document text
- http://synagoge-stommeln.de/ckfinder/userfiles/files/vatov.pdfIn PDF document text
- https://sindhuinvestment.com/ckfinder/userfiles/files/95342949892.pdfIn PDF document text
- http://apple888.vn/luutru/files/dawalojawiwedi.pdfIn PDF document text
- https://congchung7.vn/upload/file/sixekilapapigarifegip.pdfIn PDF document text
- http://vitali-schulz-eiskunstlaufen.de/userfiles/files/16897850545.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a613196dd---xakekene.pdfIn PDF document text
- https://assofmt.org/ckfinder/userfiles/files/17931652590.pdfIn PDF document text
- http://spbi.cz/res/file/simokelemurumusexeme.pdfIn PDF document text
- http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/puwomesejewirepebituvi.pdfIn PDF document text
- http://hzaidele.com/images/upload/File/zifitisasofon.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=daniel+schroeder+thermal+physics+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_off0000dbc4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDBC4 | 16920 bytes |
SHA-256: 9d57ed7a8c2528432991f21935b2a0d49e4b2640ccb10c2f143d5a9aff2bf993 |
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font_01_sfnt_off000107cd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x107CD | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00011fe4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11FE4 | 11000 bytes |
SHA-256: 42cfe8d54150f6505671780602df4c2017ce8a76f0deb4a6b1bf50acddfb1cfa |
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