PDF malware analysis — malicious · d18297c5ed3e0fd1

MALICIOUS

PDF

71.5 KB Created: 2021-10-01 08:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 6a5e13a16b6fdde94f87b2811611672f SHA-1: 8ee8c199d324a8a79923be9e1889051fc6109bc7 SHA-256: d18297c5ed3e0fd1801a735dfbf894b17eb1a762d6bd444b9c0ca3b63315dcab

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to redirect the user to one of the malicious URLs.

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://crysiq.ru/uplcv?utm_term=chromecast+from+android+to+pc PDF link annotation
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613829b96e9f0---15068493335.pdfIn PDF document text
- http://sireny.net/share/files/9045872161.pdfIn PDF document text
- https://marathonblainville.com/userfiles/files/66473359964.pdfIn PDF document text
- http://avtrak.ru/ckfinder/userfiles/files/gosulatogezafig.pdfIn PDF document text
- http://zulassungsservice4you.de/bilder/file/11495608178.pdfIn PDF document text
- http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/46852924020.pdfIn PDF document text
- https://0800-707-808.com/upload/ckfinder_temp/files/20210925222305.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/nupigodotufi.pdfIn PDF document text
- http://gdlianyu.com/uploadfiles/file/fuxalamat.pdfIn PDF document text
- https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/37698528347.pdfIn PDF document text
- http://yanartextil.com/firma/files/zudidujerabeli.pdfIn PDF document text
- http://luisacortesearchitetto.it/userfiles/files/86982815489.pdfIn PDF document text
- http://betonkeritesek.eu/Content/files/66216710704.pdfIn PDF document text
- https://hfbee.tw/upload/ckfinder_temp/files/20210916094933.pdfIn PDF document text
- https://soyana.de/js/ckfinder/userfiles/files/95285917237.pdfIn PDF document text
- https://eastmanllc.com/ckfinder/userfiles/files/veronaloloxesovopilupoj.pdfIn PDF document text
- http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/18903560414.pdfIn PDF document text
- http://etabetasurvey.com/userfiles/files/56601148242.pdfIn PDF document text
- https://hashtag.school/userfiles/file/kupoteveridimamelexer.pdfIn PDF document text
- http://polins.org/public/userfiles/file/21168010730.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/420ea7b19bd083fe3a35f197683eced2/17571102950.pdfIn PDF document text
- http://vaynhe.com/upload/files/36476501055.pdfIn PDF document text
- http://a-pluset.com/userfiles/reluwilunisugapojafagimu.pdfIn PDF document text
- http://seasonsblinds.com/uploads/ckfinder/userfiles/files/17967715022.pdfIn PDF document text
- http://vonschickenfremont.com/uploads/files/6162568501.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_off0000b47c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB47C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cc8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC8E	16716 bytes
SHA-256: `42b2500e27716fbf31185c82ad4b9fcc2df76fdecaf801098456da3f39cbf5d4`
`font_02_sfnt_off0000f72d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF72D	10868 bytes
SHA-256: `0621bd8b7f303aa095d294561bab983ae41c13380ea7985f0eebe1e7a4ee6f27`

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