PDF malware analysis — malicious · 9ea5b52fddccf5c9

MALICIOUS

PDF

82.5 KB Created: 2021-09-14 12:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 0a86ee3fa128b799eeb53642b0499ad4 SHA-1: ea89675dacacf3632c23eea06deb767caeb51b77 SHA-256: 9ea5b52fddccf5c9f73419b1adf9223f8d274473e0d79d376df4623cdda72e31

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious lure designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://brcassociati.com/userfiles/files/20840246617.pdf In PDF document text
- https://cristalparkhotel.com.ve/ckfinder/userfiles/files/sejapufeg.pdfIn PDF document text
- http://mrybalko.ru/files/lusipikeg.pdfIn PDF document text
- https://sthouseluxury.com/upload/files/9885677373.pdfIn PDF document text
- http://ruben.pl/ckfinder/userfiles/files/xolifekikovikefejepefana.pdfIn PDF document text
- https://waelfawzy.com/userfiles/file/In PDF document text
- https://fishuntpesca.it/file/1963726691.pdfIn PDF document text
- http://voyagevietnamlaos.com/hinhanh/file/2806714094.pdfIn PDF document text
- http://ibb-online.ru/f/file/80998183535.pdfIn PDF document text
- http://gemaeldeundobjekte.de/uploads/files/kewamawitezukuxanomudut.pdfIn PDF document text
- http://sentralperdana.com/file/68921473501.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/silusefunof.pdfIn PDF document text
- http://cokhilegia.com/upload/files/jikigoxeduwakumov.pdfIn PDF document text
- http://yaqeen-eg.com/userfiles/file/30317870742.pdfIn PDF document text
- http://tongshengchem.com/ckfinder/userfiles/files/79979689267.pdfIn PDF document text
- http://dijladentalcenter-qa.com/userfiles/file/62129723678.pdfIn PDF document text
- http://parkingparts.com/Upfiles/file/xuxosowevunojuxinomi.pdfIn PDF document text
- https://idea-web.ro/app/webroot/files/userfiles/files/77579709349.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133feeb6fb4d---17327212202.pdfIn PDF document text
- http://kmbb.at/userfiles/file/11159132794.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2940ce526---dowedotukitijofopadosum.pdfIn PDF document text
- http://modra-skola.cz/userfiles/file/82663966240.pdfIn PDF document text
- http://kredoteka.ru/uploads/file/89309966239.pdfIn PDF document text
- http://vinag7furniture.com/app/webroot/files/editor_upload/files/53644216249.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=movierulz+kannada+2016PDF 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_off0000d6ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6CA	10748 bytes
SHA-256: `f2ea0402042894c0d18f753bd450d75b2a05a4e17716308bb62e6128a136632e`
`font_01_sfnt_off0000efb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB5	20392 bytes
SHA-256: `58e1328a8d010b1abac986fc35f232f645dec362cf7e2b4f29231075a1adebed`
`font_02_sfnt_off000124ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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