PDF malware analysis — malicious · 84f2d736465aa50c

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 01:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: aa4f956ae3c60a56ce4488b17d7c44f4 SHA-1: 3427662ad84391bc05e7badccf504bf7f7bb904d SHA-256: 84f2d736465aa50c6b16f2dc5885109e1fde7095ab6a93a63f5d1cece881903f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URIs, many of which are part of a link farm on disposable hosting, indicating a strong intent to redirect users to potentially harmful sites. The presence of external URIs and the link farm heuristic suggest this document is designed to facilitate phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://huntic.ru/uplcv?utm_term=gm+diet+plan+in+telugu+pdf PDF link annotation
- http://quranday.org/userfiles/file/sixamepu.pdfIn PDF document text
- http://creptiles.dk/userfiles/file/32104974890.pdfIn PDF document text
- https://alident.centralcms.cloud/galeria/files/vozokomenurodena.pdfIn PDF document text
- http://spostojow.pl/userfiles/file/55713302350.pdfIn PDF document text
- https://lighthousemacau.com/html_upload/file/sovedidimodugi.pdfIn PDF document text
- https://i-intelli.com/ckfinder/userfiles/files/50672092988.pdfIn PDF document text
- https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/5349907458.pdfIn PDF document text
- http://novo-foto.ru/ckfinder/userfiles/files/delixanudipuranepopasa.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451ed3e2b58---raboranalulos.pdfIn PDF document text
- http://webinaris.training/ckfinder/userfiles/publics/files/6150296674.pdfIn PDF document text
- http://safarang.com/basefile/files/15631312743.pdfIn PDF document text
- http://kjphotocon.org/data/userfiles/files/wojusuzokogan.pdfIn PDF document text
- http://enotecagaribaldi.it/userfiles/files/lotug.pdfIn PDF document text
- http://auxerretv.com/content/public/file/xewijovumodotovip.pdfIn PDF document text
- https://hantverkarenisandby.se/UserFiles/files/76748532306.pdfIn PDF document text
- http://ffarchitettura.it/userfiles/files/kepimeweguzuwifegapikom.pdfIn PDF document text
- https://mmgrowersg.com/ckfinder/userfiles/files/viposewuxisal.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/b9nop94f1rl1nmgfteogfs3acs/zavasi.pdfIn PDF document text
- http://coachhouse.info/assets/file/605272199.pdfIn PDF document text
- http://www.trisad.kz/ckfinder/userfiles/files/dulasegini.pdfIn PDF document text
- http://espokebar.com/uploads/files/zegodolimas.pdfIn PDF document text
- https://novahealthclinic.ca/userfiles/file/nutonovis.pdfIn PDF document text
- https://prospr.fr/ckfinder/userfiles/files/71752977619.pdfIn PDF document text
- https://yourdentist.ro/app/webroot/files/userfiles/files/zaxeziwu.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_off0000b1a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1A8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c9ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9BA	15832 bytes
SHA-256: `81add2902b9957fb339824b669a72c87ef2fb686f7d2df2ba18ae8d8c8a08971`
`font_02_sfnt_off0000f26c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF26C	10592 bytes
SHA-256: `613100e9a76384923a012aa2e65809731bebc918441649fa1d00ab92fd7a6140`

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