PDF malware analysis — malicious · 1a8a4fd4b7e34a0f

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 09:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 2398b8bb1f8b8a2473b2d9d52dd07d47 SHA-1: 18c0f8e62a8a2cc8b039b2d2bd35abe74eb8bf30 SHA-256: 1a8a4fd4b7e34a0fdfe93079805b80b322d3d6c0a519a149b95a3e9674784787

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection indicate a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2e7c2a59c---77764235468.pdf In PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608258caaf62c---92060408143.pdfIn PDF document text
- http://azizolace.cz/images/file/19231490086.pdfIn PDF document text
- http://qianlong99.org/ckfinder/userfiles/files/23112538319.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e06ac1e761be47beb20ec7262f5fa219/dalepevanisuxogutabol.pdfIn PDF document text
- http://muzeumostrowiec.pl/obrazy/file/74630590415.pdfIn PDF document text
- https://triptoboloyfoundation.org/editorsfiles/files/74112411336.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/0jmsal0kt3fbfhm9omaqfkfbj9/xavasis.pdfIn PDF document text
- http://congtyvima.com/images/Download/bumutotedos.pdfIn PDF document text
- http://xboxheerlen.nl/userfiles/file/17516660448.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52b072a479---tinesogaxifivududaso.pdfIn PDF document text
- http://serdceprirody.ru/userfiles/file/83363095882.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/givegukagawo.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/isb101jqh2av6svj6r0o3f7d31/zazotuzigasik.pdfIn PDF document text
- https://northcoteplaza.com/userfiles/file/49757829233.pdfIn PDF document text
- http://szwygs.com/upload/dedowodukimiragetude.pdfIn PDF document text
- http://www.kickcommerce.com/userfiles/file/85440684039.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/3010362667.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/514622njv73ukag4m8rr83h5c1/25836844980.pdfIn PDF document text
- https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/436a5c8e38211ba68515ed0faa6c7360/45735588704.pdfIn PDF document text
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/5754fc5dfc52ea2caf3ce214037a40db/2448524694.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/98390c98ce665a0317e932e54bbe10ec/vumomusudagunepix.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/3949b7a1a2edbf22471152d01e07d93d/pusugijijokeluzekidufe.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/772bdb087ccb6d5c3baf4a554afc49d2/retovugivaju.pdfIn PDF document text
- https://serka.com/serka/upload/files/76364195692.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/46255cf329f961208a0e859a271b5201/perizuxavozuzavadiwej.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=st+thomas+all+inclusive+resortsPDF 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_off0000ebab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBAB	10736 bytes
SHA-256: `009a34077152d6f5e7aca36a5c35e155615d8287d43f4b8d4c39e35932be5f20`
`font_01_sfnt_off00010427.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10427	16980 bytes
SHA-256: `8b400489570665a72d61d53b6e3b56039cbae079dec1cefbbeb2fc71172a515d`
`font_02_sfnt_off0001306e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1306E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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