PDF malware analysis — malicious · 9296689cd0974539

MALICIOUS

PDF

84.0 KB Created: 2021-09-02 09:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: d89c96fab6e497509021da692487ed70 SHA-1: f9ca342156d0abde7230de49dd5868c0e3124c7d SHA-256: 9296689cd0974539717a145364a42c1ed32fa91c307ac8031b2d1700badda78e

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 multiple heuristics and a machine learning classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious intent. The file likely serves as a lure to facilitate phishing attacks or distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://crewmak.ru/uplcv?utm_term=gallagher+premiership+rugby+fixtures PDF link annotation
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/18f4188c1bc804d50924ccf90f5ff63b/12423674973.pdfIn PDF document text
- http://xn--49s538bo8ux8c.net/userfiles/file/22526951330.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/12503586309.pdfIn PDF document text
- http://brianhaymore.com/images/e/file/mirununipaliwojigoxi.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161195881ad6ab---79536295579.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/7e495g0n2m92fhftk3ukkkd0rt/47358250404.pdfIn PDF document text
- http://guchenes.com/d/files/82922767689.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3b0862ac4fea99f5b9a7a6bb07d04588/lavinonesiwemijaja.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b8b84188f1780ad000c4c64c6b73470e/97671040402.pdfIn PDF document text
- http://colafranceschi.it/userfiles/files/11230142808.pdfIn PDF document text
- https://carparts-fixture.com/file/file/jejitab.pdfIn PDF document text
- http://shangrilatheshow.com/ckfinder/userfiles/files/55893373799.pdfIn PDF document text
- http://lactopad.com/uploads/files/bujinutaz.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160fbb715d9467---89245540279.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be2b262e5e1---33585161540.pdfIn PDF document text
- https://satbietthu.com/luutru/files/muworibenisilarumixora.pdfIn PDF document text
- http://salocchi.it/userfiles/files/98758284111.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16126c3a0240d1---popipoxix.pdfIn PDF document text
- https://mokhalasati.com/userfiles/files/38812971249.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610a04ee34939---ramexubajatefap.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608061be949e5---joramumibanoxexojan.pdfIn PDF document text
- http://monkey-do.net/userfiles/file/wigimomulowalufusurosu.pdfIn PDF document text
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/bfac34d00765e51d0602c32d5a214654/wunelude.pdfIn PDF document text
- http://baltyk.recykling-rejs.pl/imgturysta/files/62403479481.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8198669ad---55265778522.pdfIn PDF document text
- http://kagoshimakojintaxi.com/userfiles/file/puwonuwidut.pdfIn PDF document text
- 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_off0000e05d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE05D	11076 bytes
SHA-256: `594f211e50d33e394a85b15ba11b138df25275bd4a089de1c7fe1efd2e399ba5`
`font_01_sfnt_off0000fa06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA06	18208 bytes
SHA-256: `b5f2ed300a8f0e449c49777e23f7e0af6c4b6072e3c2384e101070b4e6225651`
`font_02_sfnt_off000129a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129A8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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