MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm on disposable hosting. Multiple PDF links point to external URLs, with one specifically identified as an algorithmically-generated URL likely leading to a malicious payload. The document body is heavily obfuscated, preventing analysis of its direct content, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://catamma.ru/uplcv?utm_term=input+and+out+devices+of+computer+pdf PDF link annotation
- https://artgallery.devctn.com/ckfinder/userfiles/files/sadelesedajovugubimo.pdfIn PDF document text
- http://jungam21.com/upfiles/file/1631933643.pdfIn PDF document text
- http://aven.su/userfiles/file/fizejozobuxafoxizabilaz.pdfIn PDF document text
- http://wsystem.sk/userfiles/files/12601057568.pdfIn PDF document text
- https://wintechindia.in/ckfinder/userfiles/files/lemebiniredosezogaxi.pdfIn PDF document text
- http://podarox.ru/public/files/givevixebudokij.pdfIn PDF document text
- http://phukiendoxe.com/media/ftp/file/fogapowurubudimepos.pdfIn PDF document text
- http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/4e6d5e227be878b8e266ae7ae414dfb0/zakutubo.pdfIn PDF document text
- http://clinicaveterinariacittadivignola.com/userfiles/files/wezaninidagetamakuruzu.pdfIn PDF document text
- https://www.studioline.ie/ckfinder/userfiles/files/zekojitopupifawinavuxa.pdfIn PDF document text
- https://dascalita.ro/app/webroot/files/userfiles/files/14103465476.pdfIn PDF document text
- http://dzstock.com/Upfiles/file/93962373036.pdfIn PDF document text
- https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/vepuzifezuped.pdfIn PDF document text
- https://pisangmanis.com/contents/files/59608083626.pdfIn PDF document text
- http://3wsystems.com/shipinc/userfiles/files/6265563466.pdfIn PDF document text
- http://sun-green.de/ckfinder/userfiles/files/kexedolijopa.pdfIn PDF document text
- http://stromzeleny.cz/file/8066817628.pdfIn PDF document text
- http://hanlacsclub.com/ckupload/files/zijidefisuxoz.pdfIn PDF document text
- https://www.hkfew.org.hk/ckfinder/userfiles/files/88243044614.pdfIn PDF document text
- http://xn--h1aeekk.xn--p1ai/files/file/wososunimeka.pdfIn PDF document text
- https://limsurempat.com/contents/files/28228441588.pdfIn PDF document text
- http://dienlanhhuubinh.com/upload/files/dufugapodawukav.pdfIn PDF document text
- http://myphamso1.net/uploads/files/56731436646.pdfIn PDF document text
- https://siemreaptraveltours.com/userfiles/file/11831256560.pdfIn PDF document text
- http://serting.eu/userfiles/files/46273533584.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_off0000c07e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC07E | 16092 bytes |
SHA-256: 29332e380e0ecd894fc2a18db0cd105734e7bc6015477eded2005603e9569c27 |
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font_01_sfnt_off0000e9e0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE9E0 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000101f7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x101F7 | 10852 bytes |
SHA-256: a50aeb1ee11e449537c2c6c4b22851e082e3247c0648f637674d7f798ea8317b |
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