PDF malware analysis — malicious · 045c8e649f8b5912

MALICIOUS

PDF

68.4 KB Created: 2021-09-20 09:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 75903680caf3be6bacf6d1e7cb776741 SHA-1: 7fbf40d28d044c7700a2f97c31c02069add18013 SHA-256: 045c8e649f8b5912b1ea9b00b201fc954ee0f66e421956d46ec663854785ae0a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm designed to mislead users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. No scripts were extracted, but the structure suggests a phishing lure or a redirector.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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 http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/40862988413.pdf In PDF document text
- https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/wurudutesujipasazupi.pdfIn PDF document text
- http://studiotecnicoligioni.com/userfiles/files/76535084227.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f3c96cb8e---tiwosimipi.pdfIn PDF document text
- http://njchemland.com/upload/files/48025569074.pdfIn PDF document text
- http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161469a9e93f21---70409615744.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140dd3b16b0c---rikutamonufitilij.pdfIn PDF document text
- https://ajur.rest/uploads/userfiles/file/9785041243.pdfIn PDF document text
- http://ecoaga.com/documentos/file/61067133586.pdfIn PDF document text
- http://ugrctrani.it/userfiles/files/67750214791.pdfIn PDF document text
- https://telewebmarketing.com/FCKeditor/file/tagikejewusirowerigeji.pdfIn PDF document text
- http://onelove.cz/file/86049853453.pdfIn PDF document text
- http://dominopark.pl/public/upload/ckfinder/userfiles/files/60217635715.pdfIn PDF document text
- http://ogcdc.org/uploads/ck_upload/files/jawuroja.pdfIn PDF document text
- http://ebiocell.com/uploadfile/file///2021090810331889.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330cf005d2c---kenig.pdfIn PDF document text
- http://www.psyforyou.nl/upload/fckeditor/file/magikusojowufaxawoxapito.pdfIn PDF document text
- https://ourcampuswindow.com/ckfinder/userfiles/files/13237196713.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+get+fortnite+skins+for+free+on+ps4PDF 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_off0000ae82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE82	14832 bytes
SHA-256: `616a31a05002de545e09bb546373449b903ab6d0033c05e93a02823551fa717d`
`font_01_sfnt_off0000d38e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD38E	10572 bytes
SHA-256: `a3b94a3b73a5029f7f3db46de3cc8886daee3023dbf3fb1f6b65aa427b90d3c0`
`font_02_sfnt_off0000ebe3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBE3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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