PDF malware analysis — malicious · 1cb8741e72bbb95b

MALICIOUS

PDF

90.5 KB Created: 2021-07-05 14:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: d9546a157a6290b6ce496dc3be2c291c SHA-1: fe66507b3b7504e5c6f92067548211cace8fd7a4 SHA-256: 1cb8741e72bbb95b3a74522c87d9d1db245ed45ab1bf3fb57ed8d310a87b3766

204 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is often used to initiate malicious actions. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. Multiple URLs pointing to compromised or disposable hosting suggest a distribution network for malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 8

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://aucoindeshalles.com/menu/file/85763511147.pdf In PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fca70da667---badudokuvuf.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818ecd4dab5---57201741173.pdfIn PDF document text
- http://hotelstrack.com/bot/ckfinder/uf/files/wabumuxe.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/oco9h3q0rgglsscconhtah6t49/barimuririsoda.pdfIn PDF document text
- http://hz-karavany.cz/ckfinder/userfiles/files/kufuda.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768a2c05841---3427459880.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d5bcef3e5---zugowogakemogolaxatebiz.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bb297fb2602---zaxedaxa.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/373b6aa534f2a709f919d73c7a605999/94701568464.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/rts6gt2hbtm3j07osnvjfgjvj0/rovazubawak.pdfIn PDF document text
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/54f232b0a746ded5968801c75a6cd403/livuribusidelevanedena.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/4vobmimfnn58gbhg5m8uq7k57i/30031715607.pdfIn PDF document text
- https://circolodelpistone.ch/userfiles/file/90156023566.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2e71905ee6597ad770843c4eb08a8a07/92678871558.pdfIn PDF document text
- https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/lfpbgmqc1g42eet3hkvq3gm8d9/butedoxigenozerusoxugaruv.pdfIn PDF document text
- http://paillasse.hu/userfiles/file/35267926991.pdfIn PDF document text
- http://afro-safari.com/upload/files/26164067486.pdfIn PDF document text
- https://eobliecky.sk/userfiles/file/zubewewamutanisofomotan.pdfIn PDF document text
- http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/21070321142730659507ce7k.pdfIn PDF document text
- https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/974790bac163b9a3ff5038800cfb6192/13527888562.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/456e63d92648107cdc7a56f82c50876e/dibiwipovusapono.pdfIn PDF document text
- http://rydelko.pl/userfiles/file/31750926541.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608968eb9fe1b---tufifivibujataroburajum.pdfIn PDF document text
- http://vanxuantravel.com/upload/files/pabisizofuxixi.pdfIn PDF document text
- http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/11150046760.pdfIn PDF document text
- https://dcoderesearch.com/uploads/77269729551.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607507263a52b---20226039230.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=lesson+plan+of+history+class+8PDF 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_off0000ff27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF27	16912 bytes
SHA-256: `2267fab763310ca029e8eb575c3225c3cdd7dd236eee3fd4bc04499cd8ba66b2`
`font_01_sfnt_off00012b79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B79	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014390.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14390	10856 bytes
SHA-256: `06bef0cc8d160967d9952f3a2e8ad1369caf970dc6177381c4ba2cf3080697d8`

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