PDF malware analysis — malicious · 2db6837e6a959aae

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 20:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 495a7ccadc12ab29ce17ad1bfd8a8d7e SHA-1: 27d8dc93c245cb8466854f67ccdbe6325d9b2e6a SHA-256: 2db6837e6a959aaeea3a0fe00d4ee79e8e414cd8c321b3cb6a8bbef117dcfb36

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially harmful content or facilitate malware downloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass security controls by instructing users to decrypt a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://archism.ru/uplcv?utm_term=tutu+app+clash+of+clans PDF link annotation
- https://aiwcecckolkata.org/FCKeditor/file/losatiku.pdfIn PDF document text
- https://magyar-logyogyasz.hu/fileok/file/noxulovunofirukupesi.pdfIn PDF document text
- http://www.mezmat.ru/ckfinder/userfiles/files/tulemimanizigezigir.pdfIn PDF document text
- http://ohmamakitchen.com/uploads/files/xurudezirojepozixasegera.pdfIn PDF document text
- http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/rimimitafo.pdfIn PDF document text
- http://fjsxsx558.com/upload/files/tupemeroza.pdfIn PDF document text
- https://svarovanijelinek.cz/ckfinder/userfiles/files/30893549424.pdfIn PDF document text
- https://fratellifurloni.it/file/papomovozomes.pdfIn PDF document text
- https://lesura.net/userfiles/file/44590529677.pdfIn PDF document text
- https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/61702565865.pdfIn PDF document text
- http://malir-naterac.info/UserFiles/File/27960861002.pdfIn PDF document text
- https://senesi-sklad.cz/userfiles/file/welamabo.pdfIn PDF document text
- https://robindayne.com/ckfinder/userfiles/files/bebibalamovo.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/62dfja286vbcqdjb8kvguhblr5/82148052123.pdfIn PDF document text
- http://papinchess.ru/userfiles/file/87425720407.pdfIn PDF document text
- http://jiin-torng.com/uploadfiles/20210918004656.pdfIn PDF document text
- http://bjavc.com/filespath/files/20210906182913.pdfIn PDF document text
- http://elpijisystem.com/file/ruvewezipixojufolatim.pdfIn PDF document text
- http://ergo-logo-bamberg.de/userfiles/file/10213154953.pdfIn PDF document text
- https://www.willmarareachamber.com/ckfinder/userfiles/files/juriru.pdfIn PDF document text
- http://bsa.by/ckfinder/userfiles/files/38789836092.pdfIn PDF document text
- http://tjjjsh.com/uploads/files/21912037416.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/64cfe2e4e0f798778cb5cab6f8ffaf90/tufigewepib.pdfIn PDF document text
- https://silverlabpupsforsale.com/userfiles/files/kukeperulutufafufuj.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_off0000db6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB6E	17516 bytes
SHA-256: `62a6a34de489547cbd136c9263c128a53296ec3130628307d3ce8b527680d7b4`
`font_01_sfnt_off00010916.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10916	10316 bytes
SHA-256: `9a09a450d9300e9ea1c7e56157179a84c3f40085fdd04234b14acd9224b15bf5`
`font_02_sfnt_off00012057.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12057	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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