PDF malware analysis — malicious · 0b2e0868f35f1928

MALICIOUS

PDF

74.2 KB Created: 2021-09-15 22:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 30b9a349419f967aa114a6d49dfd7319 SHA-1: 4178b21eb9f72691bb26f34a780a6c9720549ba1 SHA-256: 0b2e0868f35f192823159d1a6425133cb79c24a6cad9889c320855fb66f0b091

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://archism.ru/uplcv?utm_term=impostor+solo+kill PDF link annotation
- http://evpltravel.com/xv_image/file/dubukaz.pdfIn PDF document text
- https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/fab5a4de3dcb2fd788f79ab63ecf6b63/16098028152.pdfIn PDF document text
- https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/pabukipepasamewudor.pdfIn PDF document text
- http://wieswioska.pl/userfiles/file/garer.pdfIn PDF document text
- https://larrialdiak.es/files/galeria/files/54979097791.pdfIn PDF document text
- https://groupekheidri.com/ckfinder/userfiles/files/88990320846.pdfIn PDF document text
- http://theemasternetworker.com/ckfinder/userfiles/files/13482942451.pdfIn PDF document text
- http://dopuskvsro.ru/UserFiles/89525547314.pdfIn PDF document text
- http://fedime.org/imagenes/pokonoluju.pdfIn PDF document text
- https://willmarareachamber.com/ckfinder/userfiles/files/4506660273.pdfIn PDF document text
- http://jinshi66.com/uploadfiles/files/67329173410.pdfIn PDF document text
- https://scavilecis.it/userfiles/file/71176280800.pdfIn PDF document text
- http://rujiahk.com/uploadfiles/file/ruwonepalivimimetezipu.pdfIn PDF document text
- http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/19915429789.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/e2kvfbl61g0s1m9v47n5locd26/kuxapeteruw.pdfIn PDF document text
- http://studioriggio.it/userfiles/files/29426900834.pdfIn PDF document text
- http://wakabaeducation.com/userfiles/file/38105199532.pdfIn PDF document text
- http://chinamakina.com/userfiles/file/11257391831.pdfIn PDF document text
- http://lnhaihui.com/userfiles/file/20210909140427_1230401653.pdfIn PDF document text
- http://year-c.com/upload_fck/file/2021-9-2/20210902070448542641.pdfIn PDF document text
- https://netcsemege.hu/ckfinder/userfiles/files/40765348895.pdfIn PDF document text
- http://baoveantam.info/upload/files/tajumekavesipitarunojif.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/49507173213.pdfIn PDF document text
- https://venefoil.com/ckfinder/userfiles/files/88114461864.pdfIn PDF document text
- http://designpavelzapletal.cz/files/file/girasikite.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_off0000c074.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC074	17388 bytes
SHA-256: `9fc4b1d2319da346a2baaec48b805dfd0c76d0ad6b7df2df08c3797be23b9a55`
`font_01_sfnt_off0000ed55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED55	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001056c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1056C	10060 bytes
SHA-256: `4acbfd2a115afc7f9aec6ca7bb7025a5099a0115150ea7e4f20879c8a82b46af`

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