PDF malware analysis — malicious · 5562fb510b353104

MALICIOUS

PDF

83.4 KB Created: 2021-09-19 17:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: f4bd24b70f650a3379de415265259d99 SHA-1: 02c61960700c6298c06869ad7cca26886ce20227 SHA-256: 5562fb510b3531047dc13148f9dd734f62ee278bf9bb839ded1161b5b6f2387d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection or download of malicious content, contributing to the overall attack pattern of luring users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://garglob.ru/uplcv?utm_term=download+battleground+mobile+india+apk PDF link annotation
- http://wwpokebar.com/uploads/files/48880791596.pdfIn PDF document text
- https://marosme.ro/hirek/file/41690575971.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ce2605279fe3326fe6d97c14ed4aec45/vugoneduloparosano.pdfIn PDF document text
- http://bursaceyizgelinlik.com/images_upload/files/rexunabexekifafud.pdfIn PDF document text
- http://car-zone.sk/data/data/file/jotutotuteluzagalasaboki.pdfIn PDF document text
- http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/91167393449.pdfIn PDF document text
- http://thewesternmist.com/userfiles/file/punawizajinakijadaw.pdfIn PDF document text
- http://jplus-ag.com/upload/files/BodyFile__6134F974B381B.pdfIn PDF document text
- https://projektovanje.info/userfiles/file/mobuzavuvibosu.pdfIn PDF document text
- http://navrattan.co/userfiles/file/12783005545.pdfIn PDF document text
- http://andreaslasnik.com/data/files/2258694963.pdfIn PDF document text
- http://didaconcept.com/admin/fckeditor/file/bukisetodisodivewilijo.pdfIn PDF document text
- http://studioiulianella.it/userfiles/files/85482419166.pdfIn PDF document text
- https://yptea.com/data/fckeditor/files/wopimixovuzat.pdfIn PDF document text
- http://gocep.org/data/userfiles/files/mijegorutoxilejatixasa.pdfIn PDF document text
- https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/61650253264.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/01af44ed1aa26dc0f6774ab783c9c4aa/27429411691.pdfIn PDF document text
- https://cbdc.co/uploads/ckfinder/userfiles/files/kidafurajutopixuzogega.pdfIn PDF document text
- http://andreaslasnik.com/data/files/zutirutuxizusemezedidok.pdfIn PDF document text
- https://jajugroup.com/ckfinder/userfiles/files/58241814555.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133ddecd5497---xajep.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/47f05e90846a5727c69fb385d987e5fc/70170581792.pdfIn PDF document text
- http://osingenieria.com/images/admin/file/sivabuxodizedogesozidazu.pdfIn PDF document text
- https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/81480956633.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_off0000daca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDACA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f2e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2E1	10984 bytes
SHA-256: `ec22c136fa41164b79565a78fb4bbdf618e9dce4c945f114bf9adf1c87293750`
`font_02_sfnt_off00010bf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF1	19820 bytes
SHA-256: `c29d0a1801d0065fe0b712ff8511b5e99b87feca50e8ddf3dc2fe31c06c8cf10`

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