PDF malware analysis — malicious · 5489b349328c270c

MALICIOUS

PDF

128.1 KB Created: 2021-05-14 14:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: d4f2bcf0bce74b8f79ff245432de907e SHA-1: 8ca4a46af7c80d32e8a981f322bf07565b22e312 SHA-256: 5489b349328c270ca5b0d2921a7c01b2ef6fc52ebecd42b64819807f60deaa9d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, including WordPress installations used for hosting malicious files. The PDF's structure suggests it acts as a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

Nyx PDF Classifier malicious score 0.9081

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://huntic.ru/uplcv?utm_term=inherently+safer+design+guide+words+focus+on PDF link annotation
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2m36h3hg0n7itlhfucjkhtp5ja/16291819067.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606d37ecd2242---27822613335.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c4661f6df---narak.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160847d33c28d4---salomuganuguv.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd12f0cfe3---sebevowiguzinekigewini.pdfIn PDF document text
- https://aravlicraft.com/cmsCart//upload/file/30808645207.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073602309871---juxofuzaz.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160749a8de8fc6---36304125621.pdfIn PDF document text
- https://clubforeducation.com/FCKeditor/userfiles/file/38701097365.pdfIn PDF document text
- http://augustaelectricalwork.com/editorData/file/87240411240.pdfIn PDF document text
- https://bataretak.com/img/files/file/95555237457.pdfIn PDF document text
- http://ankaser.com/userfiles/file/nerabozatumiravak.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e38a883a57---luveviwugurelu.pdfIn PDF document text
- http://www.alexgis.com/siteuploads/editorimg/file/76178901049.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8a823cf5f---86092612830.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608146d4dda2d---25115933186.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/h2ktdf9ukbjvqqiqug4ubibvg6/75150192067.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://scripts.sil.org/OFLIn 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_off0001b02d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B02D	5412 bytes
SHA-256: `7008a6feae3af3195bd183fd65a1ae13dd55423ae5eb4740de406c44135d1c5e`
`font_01_sfnt_off0001c2ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C2AD	11808 bytes
SHA-256: `03e115cf930701685bd23e7d2188c9dc4fc3c48f98e0582c2be04725db01be64`
`font_02_sfnt_off0001e9f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E9F7	16060 bytes
SHA-256: `5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330`

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