PDF malware analysis — malicious · 969e2cd76688d36f

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 01:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 5ecfe2109717476fdc28874158480402 SHA-1: 3acd897a21ddeb35a03eef1b1976be113ec9c2be SHA-256: 969e2cd76688d36f653414f4ed0422bc1ff26c2bf962603c4de5c04b1a1e632b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one that appears to be a redirector for downloading a file. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://ketchas.ru/uplcv?utm_term=download+bliss+os+for+pc PDF link annotation
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161563d996d42b---95498761620.pdfIn PDF document text
- https://gabinetpro.pl/kosmetyczka/krakow/files/25895841583.pdfIn PDF document text
- https://wodepcb.cn/uploadfiles/files/ludaso.pdfIn PDF document text
- http://18554080.com/userfiles/file/81043527833.pdfIn PDF document text
- http://ryyw.com/upload/files/2021/09/202109031000039987.pdfIn PDF document text
- https://toolsatool.com/userfiles/files/86152813996.pdfIn PDF document text
- https://msiutilities.net/documents/12608354875.pdfIn PDF document text
- http://studionegro.net/userfiles/files/ninukolapuk.pdfIn PDF document text
- https://kidneystonetreatment.in/userfiles/files/23560421379.pdfIn PDF document text
- http://alrabbancapital.com/file/files/19731014626.pdfIn PDF document text
- http://webinaris.biz/ckfinder/userfiles/publics/files/rejofolevejajob.pdfIn PDF document text
- http://sva-jeanroze.com/xmedia/file/kudarubalugibewubiwejotik.pdfIn PDF document text
- http://norilskgu.ru/userfiles/file/fuduvanasanekegemonudusi.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/9adbaf1c557b4a58b6af4e920fc3becd/39714463985.pdfIn PDF document text
- https://newline-eg.com/userfiles/file/24225435608.pdfIn PDF document text
- http://autosklo.sk/pictures/file/podimazago.pdfIn PDF document text
- https://typeone.com.my/ckfinder/userfiles/files/45844481012.pdfIn PDF document text
- http://www.dfdtrading.sk/ckfinder/userfiles/files/58386248367.pdfIn PDF document text
- http://elektromig.pl/userfiles/file/fojisugewugap.pdfIn PDF document text
- http://camelliafb.com/uploads/files/202109211106284695.pdfIn PDF document text
- http://anchor-m.com/js/upload/files/89717172614.pdfIn PDF document text
- https://sporyolu.com/resimler/files/63463507338.pdfIn PDF document text
- http://www.ville-dammarie.com/ckfinder/userfiles/files/80180335722.pdfIn PDF document text
- http://mnarch.it/userfiles/files/16365181954.pdfIn PDF document text
- https://ritascreation.com/userfiles/file/82436516626.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_off0000b357.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB357	10612 bytes
SHA-256: `f3c9dbf280e13d9647a858f4ff1f261f3820c170997751859bba016316cbef5c`
`font_01_sfnt_off0000cb7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB7D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e38f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE38F	16116 bytes
SHA-256: `cc8632cfd9448779ffaec61b7a4f76d519d7abb73e170745ae3bbc18d11b179c`

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