PDF malware analysis — malicious · f71fe724e4954ab5

MALICIOUS

PDF

89.6 KB Created: 2021-08-07 16:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 25dfb24a0c0d67bd54460649db33b92d SHA-1: 61c7139599154dd7036713f1d7ee721c398d0aa8 SHA-256: f71fe724e4954ab51cc9579e9006f85fe8d56044b763d4a70ea5cfe2db52afba

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a browser extension or update. While no scripts were directly extracted, the presence of numerous links to compromised WordPress sites and disposable hosting suggests a coordinated effort to host malicious content or redirect users to phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a8c16ae658fa8ebb1016dde6562eba65/94580751341.pdf In PDF document text
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/60ea0491d23f54d2c4848da24dce2fd8/8762251992.pdfIn PDF document text
- https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b70220746ed2661cb1e9fa3cac0aed9f/54060437544.pdfIn PDF document text
- http://kursadowicz.pl/Upload/file/fisuxagewekaporiko.pdfIn PDF document text
- https://autotrans911.com/thread/admin/uploads/file/vajuniguruwadaxepu.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/8eb975391175afd828bc85ce7ad3f4b2/jowari.pdfIn PDF document text
- https://vili-al.com/uploads/wysiwyg/files/benivuvaro.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa7bf203a4---xorudolezonal.pdfIn PDF document text
- https://jgranit.pl/userfiles/file/48513890332.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a9680ee2b4c5421947e2d761bc396e5a/46743245912.pdfIn PDF document text
- https://fcr-fomentoconsumoerenda.com/uploads/files/zimilo.pdfIn PDF document text
- http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/29599529304.pdfIn PDF document text
- http://2ds-creations.fr/userfiles/file/6221082916.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b6740e523---34473259209.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7ba628e0d---pimiravefirodobixo.pdfIn PDF document text
- http://aifamilyreunion.com/clients/59202/File/91641831351.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160dbb8c30a878---71475622917.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bd521e13444---87630619732.pdfIn PDF document text
- https://www.elshandmadedesign.nl/ckfinder/userfiles/files/1348316533.pdfIn PDF document text
- http://playitdirect.ca/ckfinder/uploadfiles/files/porivinuwetiwaropep.pdfIn PDF document text
- http://j-line.ca/fck_upload/file/40746760216.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/j3qgi08tq7viearnaoq10q1ib2/rozegamudiretadizoxa.pdfIn PDF document text
- http://angelescare.com/userfiles/file/47712929356.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+revenant+full+movie+in+hindi+dubbed+free+download+hdPDF 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_off0000fb9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB9C	16812 bytes
SHA-256: `2565a0fa9d200e8cb83439147676064d0a41bbf5151daff638fb49ef3d9bc977`
`font_01_sfnt_off00012768.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12768	10804 bytes
SHA-256: `aacd737e234a7518181127420a317663ba2ddbcd1f90d1f2b60e11cb6cf5f7e1`
`font_02_sfnt_off0001401c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1401C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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