MALICIOUS
156
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. Multiple heuristics indicate the PDF contains numerous external URIs and links pointing to compromised or disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the overall structure strongly suggest malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9976
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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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 http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/mafusojadixazaribudoj.pdf In PDF document text
- http://promocode.lu/userfiles/files/rifuwegupoxobiwazabon.pdfIn PDF document text
- http://senseoftourism.dk/userfiles/file/73834098089.pdfIn PDF document text
- http://ehomeforeclosure.org/images/file/kumilugedowofivu.pdfIn PDF document text
- https://dd-inside.de/userfile/file/duwofepole.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f6a960016---xawoluxusenabori.pdfIn PDF document text
- http://foto-recepty.sk/images/fotky/dajujap.pdfIn PDF document text
- https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/97257965851.pdfIn PDF document text
- https://leo.tw/upload/ckeditor/files/26630994071.pdfIn PDF document text
- https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/65883bc6369e553e7cfcfedd481120a7/11646171401.pdfIn PDF document text
- https://debcopharma.com/userfiles/file/xomipibuvoponinonaguwok.pdfIn PDF document text
- https://mancomunidadvaldizarbe.com/userfiles/files/bevuzijodateg.pdfIn PDF document text
- http://meskerjager.nl/media/files/notamokowigazogefeneledo.pdfIn PDF document text
- http://beautifulmoda.com/userfiles/files/puzomuruz.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5e2fc810ffdbe535ac582feb2be05328/91766379977.pdfIn PDF document text
- http://cameragiaminh.com/upload/files/fezaperidovob.pdfIn PDF document text
- https://mn-lawfirm.com/box/userfiles/file/53804898968.pdfIn PDF document text
- http://nfc-lampang.com/user_img/files/kinasi.pdfIn PDF document text
- https://greenbins.ca/ckfinder/userfiles/files/34439457985.pdfIn PDF document text
- http://rszm88.com/upfolder/e/files/20210909232915.pdfIn PDF document text
- https://exihomes.com/userfiles/files/33441205547.pdfIn PDF document text
- http://dungcucaytrong.com/images/files/50059115060.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=screen+size+of+m32PDF link annotation
- http://s292376414.onlinehome.fr/datas/imgmail/file/fekikaritekoj.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_off0000ebdd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEBDD | 17180 bytes |
SHA-256: efdb8f846f88c966f913d72b4f7b98cf23a3dae409e23be5ecfa4c9afa027788 |
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font_01_sfnt_off00011891.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11891 | 10616 bytes |
SHA-256: ee94cfa65524dfa1f22f5b174719ad8b97935df0abe581e1792cde48703f4a5e |
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font_02_sfnt_off000130e3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x130E3 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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