PDF malware analysis — malicious · 1540dc3ae1f6ea36

MALICIOUS

PDF

105.4 KB Created: 2021-07-07 02:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 989d0a2787448b12e6b6f00a4e0b9e26 SHA-1: 09c73c3ef2aa2095f66a9b4cdb490a83ef8e6464 SHA-256: 1540dc3ae1f6ea36f3372a42859ea080593b86b40ab8b8da3559334bd8678dba

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress uploads and disposable hosting sites, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9790

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 https://coretry.ru/uplcv?utm_term=list+of+personas+persona+5 PDF link annotation
- https://amatnieks.com/pictures/image/74196043179.pdfIn PDF document text
- http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef12ecdf45---4000477318.pdfIn PDF document text
- http://campbellelectronics.com/uploads/dukes.pdfIn PDF document text
- http://chanakyaaerospacedefence.com/userfiles/file/miniwafinozowo.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947591878c0---vatinadakusokudebuti.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/79f422d6f0a3387a595342089339fa8a/18763820112.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f94d8bfb0---96312284691.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bd6253831---70615344663.pdfIn PDF document text
- http://casier-a-bouteilles.fr/file/panavabebobomefepapif.pdfIn PDF document text
- https://youkuvpn.com/upload/files/39858753857.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbaa67e649---59245271257.pdfIn PDF document text
- https://ngoctraithaibinhduong.com/uploads/news_file/fojipepepogowagil.pdfIn PDF document text
- http://broorybulldogs.com/clients/33993/File/vejakinalinunuzen.pdfIn PDF document text
- http://phpirateboosters.com/clients/867602/File/64242772265.pdfIn PDF document text
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/68454ea3156329a3a9de10da841eb9f1/pazetumizogujadumeval.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607880ca31880---55776967351.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/vowupibebebolivowexitotom.pdfIn PDF document text
- https://2acontractor.it/images/file/fejaximeluzobipazan.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c772c4b9d7---78364975003.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/dbfa359e1e76263cbd48ddab23757938/55387725870.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4ec53d41---13247912125.pdfIn PDF document text
- https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/eqotsgd5orvvo4num2rlfqrnfh/4997284565.pdfIn PDF document text
- http://studiodabo.eu/userfiles/files/15731252146.pdfIn PDF document text
- http://shipagents.nl/uploadfiles/file/25895898924.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3d6e1bd91c603f9288d7b5c9300c1052/wulisurofovovawekegefo.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/o109tp6cl0oji42k3brorm3766/topovefepewijozi.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_off00013a5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A5A	17568 bytes
SHA-256: `545ad45f6627fcdeb18fc8fa8795ed000f78db8ea7f00720806ab10b8335216e`
`font_01_sfnt_off0001687e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1687E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00018095.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18095	10396 bytes
SHA-256: `d6db1fccde69a9d49e9e5b1dcbb6409e6a09877b7ad15f2f5b9609c2858a37aa`

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