PDF malware analysis — malicious · 30c0b6213e0cb48f

MALICIOUS

PDF

70.9 KB Created: 2021-09-28 20:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: c34b0c4b1aa7e361f4d9d82f00381774 SHA-1: 2e670f58faafbe5a93ad3f9f77b042a0f517717c SHA-256: 30c0b6213e0cb48f45e6faee00fe51ecee6c7855f71cd6e043e4916d8473a3c6

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://catamma.ru/uplcv?utm_term=android+usb+ethernet+rndis+driver+download+for+windows+xp PDF link annotation
- http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16133de73b65ab---1674387946.pdfIn PDF document text
- http://tiwtactic.com/userfiles/files/22409208369.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613381d6d4b5d---43363312513.pdfIn PDF document text
- http://banquat.com/userfiles/files/83148439178.pdfIn PDF document text
- http://vekosgroup.ru/userfiles/file/54408291694.pdfIn PDF document text
- http://www.northern-japan.com/image/upload/File/sawitixavowaluguxe.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/aa4e82cf97bd3a8f20e954c3add55e99/47692112101.pdfIn PDF document text
- http://feynburg-uhren.de/uploads/gejimabosakaroje.pdfIn PDF document text
- http://phukiendoxe.com/media/ftp/file/zuvuzenipe.pdfIn PDF document text
- http://ekorepetycje.eu/Upload/file/lajulixulujomaxisuxolovab.pdfIn PDF document text
- https://pchome.uzai.ca/upload/files/92864219975.pdfIn PDF document text
- http://smartwealthhk.com/userfiles/rugujotizidubudamifu.pdfIn PDF document text
- http://mariancozma.com/_user/file/36959351858.pdfIn PDF document text
- https://twr1115.net/files/fckeditor/file/26854314491.pdfIn PDF document text
- http://technocom.pl/editor/file/93598323451.pdfIn PDF document text
- https://sukaunited4d.vip/contents/files/48279660801.pdfIn PDF document text
- https://sproname.com/files/userfiles/files/17540264620.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a2b468eb0---43983393632.pdfIn PDF document text
- https://daotaolaixesontay.com/uploads/file/86347607928.pdfIn PDF document text
- https://conexkarvan.com/cache/fck_files/file/54158777737.pdfIn PDF document text
- https://uat-tunisia.com/userfiles/file/patelibelovobevujesod.pdfIn PDF document text
- http://thuexedanang247.com/uploads/image/files/rijeretujas.pdfIn PDF document text
- http://coniperfumes.cl/js/ckfinder/userfiles/files/26807762587.pdfIn PDF document text
- http://escritacontabilidade.net/fotos/news/file/9586331547.pdfIn PDF document text
- https://vcvscr.cz/www/www/fckphotos/file/84889441259.pdfIn PDF document text
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/25edb1ba846efce57613b450b7b169ad/vewojirifibo.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_off0000b282.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB282	16020 bytes
SHA-256: `e93a3b4817d85fbe6e754692962039c1fb6fad1898ff6c3fea302fa9f733aa39`
`font_01_sfnt_off0000dba7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBA7	11068 bytes
SHA-256: `eaa2763f8d20d7fe351757e5af11af9d84b0a54d8195f807b760a073ad7b3379`
`font_02_sfnt_off0000f545.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF545	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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