MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The high number of external URIs, many pointing to potentially disposable domains, suggests a link farm or phishing campaign. ClamAV detection and ML classification further confirm its malicious nature, likely as a phishing lure or a downloader for further stages.
Machine Learning
- Nyx PDF Classifier malicious score 0.9820
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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://secureyun.cn/uploadfile/file///2021091021192553.pdf In PDF document text
- http://koddous.com/userfiles/file/59272052707.pdfIn PDF document text
- https://twinslock.com/ckfinder/userfiles/files/73560441300.pdfIn PDF document text
- http://facilitymanagementassociates.com/survey/userfiles/files/zovorogopewazini.pdfIn PDF document text
- http://slkuang.com/v15/Upload/file/2021916045325291.pdfIn PDF document text
- http://szermgrt.hu/uploads/ckfinder/userfiles/files/72609043969.pdfIn PDF document text
- http://emeat.ru/var/files/tijapi.pdfIn PDF document text
- http://everbeenmagnet.com/js/upfiles/files/disodopu.pdfIn PDF document text
- http://dioceseofniranam.org/userfiles/file/48607502677.pdfIn PDF document text
- http://pzhjintai.com/upload/files/tovomemexatedanonefitakal.pdfIn PDF document text
- https://processwork.archerhuang.com/ConImg/files/60502249161.pdfIn PDF document text
- https://happycolaborativo.com/uploads/files/tidolelu.pdfIn PDF document text
- http://intertribo.sk/files/dewulugiwipukudaw.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161429acd1aa4d---rarek.pdfIn PDF document text
- http://reelproductionshd.com/userfiles/file/fojoxijunigiwexege.pdfIn PDF document text
- https://ceylanotel.com/firma/files/51744482771.pdfIn PDF document text
- http://skisun.it/userfiles/files/betamefatonev.pdfIn PDF document text
- https://micro-logic.ro/images/uploaded/file/xikonitetewiroroboboza.pdfIn PDF document text
- http://temple.mo/userfiles/file/65589405917.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/92a3934c8582a7af0c937623487c8220/rigujugu.pdfIn PDF document text
- https://mimpiindah168.com/contents/files/54155408023.pdfIn PDF document text
- https://culturasiapamplona.com/guiarte_userfiles/files/24257470112.pdfIn PDF document text
- http://whkmradio.com/userfiles/file/39721941884.pdfIn PDF document text
- http://velocimapper.com/webfiles/file/87592855380.pdfIn PDF document text
- http://antropolog.ru/userfiles/file/wuvom.pdfIn PDF document text
- http://kcntanduc.vn/img_duhoc/files/3995306542.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=words+that+start+with+r+and+end+with+sPDF 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_off00010d9f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10D9F | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off000125b6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x125B6 | 10380 bytes |
SHA-256: 10bb2469aea51c99353ef6929721343332d0c5cabde55d5ea93de8ad858516e1 |
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font_02_sfnt_off00013d2e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13D2E | 16680 bytes |
SHA-256: cdf8a17fcc0d6845f15b6ca912f04895a09c30d431100c31d4c77e833a3dd710 |
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