PDF malware analysis — malicious · 557762330e2e3b75

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 12:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: bdd44568c5c1ce57694f930e9032f220 SHA-1: c894138f831bffa4fbc17b8805f596a48889afc3 SHA-256: 557762330e2e3b75ab59f25490fcaf6bfb060bbb5a1d30c98ca5d652ba6b262e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to unknown or potentially suspicious domains, suggesting it functions as a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links, indicating a tactic to distribute malicious payloads or phishing lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://thehideawayresortpattaya.com/userfiles/files/juxajokawakugilaxoz.pdf In PDF document text
- https://inprovitpuertorico.com/ckfinder/userfiles/files/pirak.pdfIn PDF document text
- https://propactionvehiclesuk.tv/userfiles/files/depisesamutu.pdfIn PDF document text
- https://afra24.com/basefile/afra24/files/jomeluwepuzanefugezet.pdfIn PDF document text
- http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/giripibafevinova.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/fki3arb585fnslrlkuahtbc2i4/26085475244.pdfIn PDF document text
- https://k31szmq42-nu28.com/contents/files/jawebupimutovunud.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff64b6c09b---82418450559.pdfIn PDF document text
- http://js-space.de/userfiles/file/15343890756.pdfIn PDF document text
- https://corpus.bg/files/fck/file/bupajonojalimisuv.pdfIn PDF document text
- http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/pefopilivojaved.pdfIn PDF document text
- https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/gabapajopotodejidujirig.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/914907555.pdfIn PDF document text
- http://pooq-design.com/app/webroot/fckfiles/file/48816984493.pdfIn PDF document text
- http://prospekt-rostov.ru/ckfinder/userfiles/files/34710895200.pdfIn PDF document text
- https://iphonerepairservice.nl/app/webroot/files/userfiles/files/30317685130.pdfIn PDF document text
- https://swalaya.in/userfiles/file/40380842524.pdfIn PDF document text
- https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/wepazumidepovixik.pdfIn PDF document text
- http://trunglamdecor.com/uploads/userfiles/file/43694620469.pdfIn PDF document text
- http://xn--h1acbpobggs.xn--p1ai/data/files/melexekipulofedila.pdfIn PDF document text
- http://2446665a.ru/ckfinder/userfiles/files/noniwupugomigumuron.pdfIn PDF document text
- https://shieldtech.cz/ckfinder/userfiles/files/tokeretipotapebavanopovu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=dinosaur+hunter+deadly+shores+mod+apkPDF 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_off0000d9fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9FE	17596 bytes
SHA-256: `b4b22640445178038ab571ed7f1b015e9e253fcfcfb184160111efce499728ed`
`font_01_sfnt_off000107cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107CD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011fe4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FE4	10964 bytes
SHA-256: `4bfa98a238cc0ee9769b00732a4e89eaa10e61bc262d037545a1db4940463c2d`

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