PDF malware analysis — malicious · 65d11c199463566d

MALICIOUS

PDF

92.6 KB Created: 2021-06-26 22:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: ba9fd7e6502ec798ae1ec295c7c6915b SHA-1: 562351afc97a8c50f06d6561709e409aae4e9175 SHA-256: 65d11c199463566d082b607c4d7ccaa00a183415f65ae8c4d86b5b3378c09bc6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://innovatepc.com/userfiles/file/48280170976.pdf In PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/283ff8ee117e930b3f546e8c503b84ae/58811511397.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb3324eeb6---58594123236.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f6f18052c7efcba6a4c64128e5ef6613/69633141074.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608259c06e1d8---zesuzamedi.pdfIn PDF document text
- https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/e0fcafd212fd1114aff3a53f1ed9071a/75784348156.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b8446a4b8---vadelib.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/9f1ce655eaa132eae71d2b5e3132c112/weluvul.pdfIn PDF document text
- https://karinbentum.nl/uploads/file/20577461561.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/d86f3463449675e43d6d4a5dbc1fb491/31565156373.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971ed7be344---6626423960.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f28cde477b---rutobubup.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7bb933db9---90610790478.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/32988158589.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608849446f2a9---8736023699.pdfIn PDF document text
- https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e2bebdd3f247302f9d29fa3610b230de/45240442213.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a55a387c5---33638888751.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ed3542b9be360d1e7b24dcc6df581f8/vukirinutupamimaju.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/0d3999ca5d2b8b7815f03dcc73a494c7/masepukivoja.pdfIn PDF document text
- http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/0ea675eb1c76a3b8b8d1ff2d2de7aa58/2571077878.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099e3dcd48c5---91235914822.pdfIn PDF document text
- http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3889002d5---sirusoxugik.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c777f21dbeb---wedixakezupolev.pdfIn PDF document text
- https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8d8cf69f---28568759160.pdfIn PDF document text
- https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3fgu64b86acghk7fr3pdpjd758/jesoviko.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+female+eunuch+meaningPDF 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_off00010859.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10859	17008 bytes
SHA-256: `240f4e0ee73ef80731836e9cedad49fbdc4be9717f1f7e19a2e0e96f9c008272`
`font_01_sfnt_off00013465.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13465	10360 bytes
SHA-256: `6caee136e7efb961a9bcf7f90a8575b67b2cf693956a288b50ab9f4a8e8b366e`
`font_02_sfnt_off00014b8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B8A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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