MALICIOUS
146
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding a large number of external URIs, including 'https://catamma.ru/uplcv?utm_term=java+handler+post', which likely serve as lures for phishing or malware downloads. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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QR-code redirect lure medium SE_QR_LUREDocument instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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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://catamma.ru/uplcv?utm_term=java+handler+post PDF link annotation
- https://insolite.lu/img/userfiles/files/juburirok.pdfIn PDF document text
- http://knowleangling.co.uk/ckfinder/userfiles/files/viperigonuzegujagawopepum.pdfIn PDF document text
- http://bortran.com/upload/image/file/20210910090647.pdfIn PDF document text
- https://premium-house.uz/images/file/guruxoxeguzujawemof.pdfIn PDF document text
- http://findusafranchise.com/files/files/tejemanimisugaparotewot.pdfIn PDF document text
- https://ofly.om-digitalsolutions.cn/upload/files/suvorimalusekoredilapogor.pdfIn PDF document text
- http://windowsplusllc.com/ckfinder/userfiles/files/22480555654.pdfIn PDF document text
- http://lsmtrontractor.com/upfiles/file/20210908010441.pdfIn PDF document text
- http://refah4ter.info/basefile/hotelrefah4terir/files/47783069345.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b0d30b5981207d630fbeb84123a02006/92977416090.pdfIn PDF document text
- http://fecoil.com/userfiles/file/xirixixudaki.pdfIn PDF document text
- http://ecofincas.net/ckfinder/userfiles/files/84302613970.pdfIn PDF document text
- https://www.thaiahpa.com/flash/files/10695461652.pdfIn PDF document text
- https://ipekyolumedya.com/resim_galeri/file/80828139210.pdfIn PDF document text
- http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/faxuruzukibonudet.pdfIn PDF document text
- https://kangaroovietuc.vn/webroot/img/files/43812748130.pdfIn PDF document text
- https://mercerapparelss.com/userfiles/files/70372196320.pdfIn PDF document text
- http://kuryakyn.ru/userfiles/file/67247020218.pdfIn PDF document text
- http://unternehmensberatung-hegenbarth.de/userfiles/file/51475734689.pdfIn PDF document text
- http://bulk-supplies.com/userfiles/file/didevepi.pdfIn PDF document text
- http://cuboni.com/uploadfile/hong202109090346555065.pdfIn PDF document text
- http://talentfuturesservices.com/sharpinstitute/images/files/18040445440.pdfIn PDF document text
- https://apexsafetyproducts.com/ckfinder/userfiles/files/bubipiputirejovuxilew.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_off0000f669.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF669 | 17208 bytes |
SHA-256: 018cef0a680c25c72ef58b2b25b34c0ae769775285c82f982cc75da1aecb423c |
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font_01_sfnt_off00012346.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12346 | 10452 bytes |
SHA-256: 9b55dc81d6eeeb5bd97311070e960b603e847776dd23bb53ecbcf017e069919f |
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font_02_sfnt_off00013af1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13AF1 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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