PDF malware analysis — malicious · 98f7d44a51247367

MALICIOUS

PDF

87.3 KB Created: 2021-08-31 10:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2154130cf7c80a230eb29628df633944 SHA-1: ad584eece71d9a267b0774e4367bb15e4968ed2b SHA-256: 98f7d44a51247367c4cadac637c41031b901328efda1ccad365f283976e3513e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are on disposable hosting, further supporting a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/3lmtf8t3f312p1v26vjqqool21/87169694620.pdf In PDF document text
- http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/30837006807.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c55c1a34bae---48941225798.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b086d53e8b---4396634223.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098398e9ada3---44502016682.pdfIn PDF document text
- http://allamericannursing.com/userfiles/file/pakesizelibivedubikamax.pdfIn PDF document text
- http://beming.com/ressource/site-image/files/wonif.pdfIn PDF document text
- http://k-souz.com/userfiles/file/15489795330.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608721f2bf01c---fuwesun.pdfIn PDF document text
- http://carrozzeriardue.it/userfiles/files/4294827808.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/aq7040r7muhu3s1cv9sguhgmi9/30769762765.pdfIn PDF document text
- http://amadpich.com/userfiles/file/41672727290.pdfIn PDF document text
- http://silver.jo/ckfinder/blanc/files/31738983441.pdfIn PDF document text
- https://greenlakepaint.com/ckfinder/userfiles/files/85336795322.pdfIn PDF document text
- http://namjapizza.com/app/webroot/files/lotedozupulefovavamuna.pdfIn PDF document text
- https://wecareu.net/ckfinder/userfiles/files/77158272417.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/2dbc77d07ff4dfca38bd23a31b4ea00e/damavetezetidowisepobitow.pdfIn PDF document text
- https://novahealthclinic.ca/userfiles/file/kadosuwudujesutewidos.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/51bb81712a32d347201de52e2ac21178/gimuzafidub.pdfIn PDF document text
- http://www.seja.lv/assets/ckfinder/core/connector/php/uploads/files/41583634491.pdfIn PDF document text
- https://leganordavigliana.it/uploads/file/33769773877.pdfIn PDF document text
- http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34452040685.pdfIn PDF document text
- http://premiercontractinginc.com/files/file/39597376271.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096515bd9574---linudenupuregariretetifa.pdfIn PDF document text
- http://dui-antidote.com/images/userfiles/file/13285880004.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/vhi8fpagjqsn9hpbjedj1rr6i0/jezena.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b437a85bda9---duzobovikusuxuwepuwuxef.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=introduce+yourself+in+english+for+studentsPDF 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_off0000ec40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC40	10760 bytes
SHA-256: `4bf4bec58120d6ce1fe114d450425ec95b034d1989d85cc1520384bba2058c40`
`font_01_sfnt_off000104b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104B8	18976 bytes
SHA-256: `1a4f39c27d15cb278518ab151da3ac2d75b144395b6713fffc4e53027e92e4d1`
`font_02_sfnt_off0001366e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1366E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.