MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs, many pointing to compromised CMS upload storage or disposable hosting, forming a link farm. The primary attack pattern appears to be luring users to external sites, likely for phishing or malware delivery, consistent with a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9967
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://allytemp.ru/uplcv?utm_term=english+speakers+in+china PDF link annotation
- https://kolkatanagariksammelan.org/ckfinder/userfiles/files/karowu.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff7c892816---72078816146.pdfIn PDF document text
- http://studioprogettoarchitettura.eu/userfiles/files/direbofo.pdfIn PDF document text
- http://liveisagenix.com/ckfinder/userfiles/files/zumuxevul.pdfIn PDF document text
- http://patrick-jardinage.fr/ckfinder/userfiles/files/kudewifigogububotod.pdfIn PDF document text
- http://cheniou.handysociality.com/upload/files/loporuzutobij.pdfIn PDF document text
- http://cameradungphat.com/uploads/files/kajad.pdfIn PDF document text
- http://kaiyudachem.com/filespath/files/20210914162511.pdfIn PDF document text
- http://studiotecnicopetrillo.eu/userfiles/files/jofowaneg.pdfIn PDF document text
- https://ihappywash.com/uploads/files/202109200648394896.pdfIn PDF document text
- http://baltic-rt.ru/ckfinder/userfiles/files/nokolubamivefilerizufud.pdfIn PDF document text
- http://siciny.eu/userfiles/file/72753846133.pdfIn PDF document text
- https://eastmangroupllc.net/ckfinder/userfiles/files/31160557451.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4733a0f72c49cc96358647d6931023f2/5520530036.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/988123aa3e9a36fea5b75a5d79c84ef7/givegatiranoju.pdfIn PDF document text
- http://52fotki.ru/ckfinder/userfiles/files/difad.pdfIn PDF document text
- http://adfaveo.com/image/files/20210915_211024.pdfIn PDF document text
- https://owop.challengersports.com/userfiles/files/37803906081.pdfIn PDF document text
- http://f-kcc.jp/user_data/userfiles/files/mojigekud.pdfIn PDF document text
- http://ylpqzl.com/ckfinder/userfiles/files/kamot.pdfIn PDF document text
- http://bsinteriordesigner.com/userfiles/files/zonit.pdfIn PDF document text
- http://www.velkoobchod-man.eu/ckfinder/userfiles/files/29546115555.pdfIn PDF document text
- http://topflexsports.com/uploads/sozaxexigadafek.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_off00012bfb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12BFB | 10508 bytes |
SHA-256: a5894c6cb6faf019c7f9f3bc85f04ee73a586e7762c02ecc81c1056160d036b4 |
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font_01_sfnt_off000143c6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x143C6 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00015bd8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15BD8 | 25112 bytes |
SHA-256: 765538e666c2597ec083575ca274757448362c2ffed483662b5824d011c1edbe |
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