PDF malware analysis — malicious · 63350e066135e9a6

MALICIOUS

PDF

86.3 KB Created: 2021-09-19 03:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 367195d8b3d96385891a539fa0ae75ae SHA-1: 45c035ce16434bf9639d578e9c7a727f07f82038 SHA-256: 63350e066135e9a6fbc7d223dd06fbbf8e7a290192c0687325ef874a285a1cb9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS platforms. The presence of 'utm_term=porn+games+android+apk' in one URL suggests a lure for potentially unwanted content or phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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
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.
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://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/6tmdp86etrc430cl24979s98ig/8952496268.pdf In PDF document text
- http://paillasse.hu/userfiles/file/34037932525.pdfIn PDF document text
- http://studiotravenzolo.it/userfiles/files/80653356122.pdfIn PDF document text
- http://makinsushi.com/uploads/files/83827559471.pdfIn PDF document text
- https://mongolia-volkslift.com/uploads/files/kisefap.pdfIn PDF document text
- https://clove7.com/userfiles/file/37470569086.pdfIn PDF document text
- http://gps-ambroisie.com/ressource/site-image/files/7571499773.pdfIn PDF document text
- http://cheniou.handysociality.com/upload/files/xamokowemuketuxonu.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146645480068---musodavi.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4ef46f3ea---50002347479.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/duc1bna4dthur5f48q4p3hai87/25447198154.pdfIn PDF document text
- http://t-p-fortune.com/userfiles/file/53860761538.pdfIn PDF document text
- http://exosushi.com/uploads/files/10157436427.pdfIn PDF document text
- https://arrad.ch/modules/ck/ckfinder/userfiles/files/1628199083.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161386b730de04---penagifor.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c9a7f3709---16290648987.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021090613503935.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ae9b27910315cee5feabf4e4e56e019f/48357290602.pdfIn PDF document text
- http://bukharageorgia.com/sites/default/files/file/89884343764.pdfIn PDF document text
- https://numen-wow.com/userfiles/cloud/files/17587525193.pdfIn PDF document text
- http://morebricks.com/ckfinder/userfiles/files/vexado.pdfIn PDF document text
- http://massimomoroni.it/userfiles/files/551780608.pdfIn PDF document text
- http://daugiavanthienphuoc.com/media/ftp/file/58375422104.pdfIn PDF document text
- https://bhopalliteraturefestival.com/mpsdp/uploads/files/pibidavifelepixa.pdfIn PDF document text
- http://www.jobibon.com/admin/userfiles/file/pitawedizudumadurajupo.pdfIn PDF document text
- https://naveenent.com/administrator/imagetemp/file/tudutavilovupotame.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=porn+games+android+apkPDF link annotation
- 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_off0000ef43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF43	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010755.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10755	17312 bytes
SHA-256: `995ba39790ff0aed9d9a9ba816ec985e5c2d28252a6e9b79af3b28e4582d0f60`
`font_02_sfnt_off000133ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133EF	10684 bytes
SHA-256: `5bf2370661c982f50ebe5d00920694aff051cacd45be8e869a188aefa4085cac`

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