PDF malware analysis — malicious · 1461bb3821ba206d

MALICIOUS

PDF

74.7 KB Created: 2021-08-16 15:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 863784e7929c65f3b2d595b69b9dc409 SHA-1: 00fd1958132c1fae417b0c1218a97524cbd645b0 SHA-256: 1461bb3821ba206d6c0fe8a4328d57cc98ca6fc0cb643afc2639389ca6d11008

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. The primary purpose appears to be SEO manipulation or redirecting users to potentially malicious content hosted on these sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://nadamasristorante.it/file/mobefe.pdf In PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17a2191d83---zefikojalarovituzatumifi.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb8d07c0e3---24595966505.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ac993a2b8---69007290092.pdfIn PDF document text
- http://nfrostov.ru/upload/files/60159233444.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff6ff329b---kejazurarufukij.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc8de352a1---numekitokefasudikedoxam.pdfIn PDF document text
- https://primer-spb.ru/files/files/7221255551.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111a16b513df---48702568953.pdfIn PDF document text
- http://kleiberit.ru/files/file/35371023280.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77555ab59c---fotifubewutuferelag.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075efcf91898---62097318814.pdfIn PDF document text
- http://studiodabo.eu/userfiles/files/topazabejixow.pdfIn PDF document text
- https://picinterior.com/ckfinder/userfiles/files/sofololokarozetub.pdfIn PDF document text
- https://al-farh-iq.com/upload/userfiles/file/67461724012.pdfIn PDF document text
- http://fmi.lu/userfiles/files/86919154173.pdfIn PDF document text
- http://hk-keber.de/images/file/31715332135.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/22897090904.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc485ea3980---1142192989.pdfIn PDF document text
- https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4322badf99---puwomefapoxuzaw.pdfIn PDF document text
- http://aquarell.ro/userfiles/file/2345377779.pdfIn PDF document text
- https://www.abrasco.org.br/ckfinder/userfiles/files/31274789596.pdfIn PDF document text
- https://charterboatdeliverance.com/uploads/files/28455414815.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021061413564841.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ezel+dizisi+bedava+indirPDF 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_off0000bf4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF4B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d762.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD762	10272 bytes
SHA-256: `15a891d50f1a379fa6d047555a22403600649f526fbeba6f81dc7ca4bed50249`
`font_02_sfnt_off0000ee94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE94	18412 bytes
SHA-256: `30d0fabf3dc1c09cbcc39dd3fa445245d5da01bebe7d86d8359f99f0e7b5f16b`

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