PDF malware analysis — malicious · d3ecb91716d44cf0

MALICIOUS

PDF

86.7 KB Created: 2021-10-17 19:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21

MD5: a28329589a9f136905808d8131a0b18e SHA-1: 90e03123876c54c9a5294efb4f8cbdeef190329c SHA-256: d3ecb91716d44cf09009ec90c7e7e9df79de5722987b7cab7106f40e37eb512b

164 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
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 https://penzion-pod-rozhlednou.cz/img/file/mutukizusinobutaji.pdf In PDF document text
- http://tjjjsh.com/uploads/files/koporewisoxipedisijodotaw.pdfIn PDF document text
- http://www.giuseppe.ru/ckfinder/userfiles/files/warizolezib.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/49235524162.pdfIn PDF document text
- http://dolgoprudnyj.inhome360.ru/admin/ckfinder/userfiles/files/81846577704.pdfIn PDF document text
- http://duplisite.com/userfiles/file/63238184156.pdfIn PDF document text
- https://beauty-full.ru/uploads/files/davopifudarar.pdfIn PDF document text
- http://bladensburg.abwingsmd.com/uploads/files/vejewebitusifajuma.pdfIn PDF document text
- http://bjjiffy.com/upload/polavatu.pdfIn PDF document text
- https://fulzugaskozpont.hu/files/boruwelaseromenexi.pdfIn PDF document text
- https://kaparatt.com/images/File/54595008382.pdfIn PDF document text
- http://hiace-yoshikawa.com/js/upload/files/nibutevajobobefa.pdfIn PDF document text
- https://pemaboutiquehotel.com/assets/userfiles/files/towewo.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4123b3561---22179002748.pdfIn PDF document text
- http://thephinhmienbac.com/upload/files/zamepuluwafumigimira.pdfIn PDF document text
- http://akwarella.pl/user_uploads/file/49641741250.pdfIn PDF document text
- http://sial.pl/galeria/file/16272761996.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/ce7998179a78a87695e57da9c301b858/26563396099.pdfIn PDF document text
- http://rtm-plus.com/ckfinder/userfiles/files/62478251026.pdfIn PDF document text
- https://seltec.io/images/uploads/files/lojet.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16131085527144---36115823847.pdfIn PDF document text
- http://khojedu.net/userfiles/file/vobuvifateliwaze.pdfIn PDF document text
- https://livbiopharma.com/userfiles/file/93494615236.pdfIn PDF document text
- https://avflash.nl/upload/files/lamevunuxad.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/RhDyTiV0TgQ/uplcv?utm_term=part+of+the+facePDF 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_off0000ebcd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBCD	20116 bytes
SHA-256: `0c29e4a959bd6e2120363c756e66bd8360932e1de4c2a0f11bc6b639b574ea8d`
`font_01_sfnt_off00011efe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EFE	10024 bytes
SHA-256: `f84b293a0639439fae28797cdecba084be3679527374521d3800f1366310b7c7`
`font_02_sfnt_off0001356a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1356A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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