PDF malware analysis — malicious · af28d905e1c51312

MALICIOUS

PDF

88.0 KB Created: 2021-09-20 13:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21

MD5: dcc37c1b31985dbed8c850bb834bb25d SHA-1: 2152132bebc9c9d3c64eaf660040294aa5b1eb05 SHA-256: af28d905e1c5131278659630f0d0055a71cf8fd45fe23e8454e02dd4bfc4d576

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://catamma.ru/uplcv?utm_term=giochi+naruto+per+android PDF link annotation
- https://cherrychile.cl/cherry/uploads/contenido/files/43575231347.pdfIn PDF document text
- http://hypotekaprezamestnancov.sk/res/file/xitaxumufajexegezara.pdfIn PDF document text
- http://www.nagsa.es/ckfinder/userfiles/files/depijosafamonaserulap.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/cb0dfb34d4317d43f6a59b6734248426/rilodurevutamirovetebiguf.pdfIn PDF document text
- http://hndgyl.com/v15/Upload/file/202199326149575.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ead83ba9c5---votofoze.pdfIn PDF document text
- http://speaklifeiamgreatness.com/files/files/5545916642.pdfIn PDF document text
- https://joinvita.com/neu/userfiles/file/31686731992.pdfIn PDF document text
- https://oreopay57.com/ckfinder/userfiles/files/77129605245.pdfIn PDF document text
- https://tjp2-hotlink-j3t.com/contents/files/54540579249.pdfIn PDF document text
- http://belstroyiz.ru/img/file/parukenalu.pdfIn PDF document text
- http://abwingssuffolk2.com/uploads/files/82399661487.pdfIn PDF document text
- http://uptindia.com/newsimages/file///25174011284.pdfIn PDF document text
- http://ticaproduce.com/ckfinder/userfiles/files/65827528926.pdfIn PDF document text
- https://n-vv.dk/userfiles/file/79685042391.pdfIn PDF document text
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/9f09e0adfdbbc8a573f0ec8cb7b188c7/10132934044.pdfIn PDF document text
- http://kronospan-mofa-hungary.hu/editor_up/sawuxuzoniwomikavafixamad.pdfIn PDF document text
- http://we-women.de/default/files/uploads/file/74529555306.pdfIn PDF document text
- https://eastmanllc.com/ckfinder/userfiles/files/63837322035.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e7db89aa77d23e95b16d3bc63c1f1714/37886746860.pdfIn PDF document text
- http://aci-immobilier-douai.fr/userfiles/files/79100586743.pdfIn PDF document text
- http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/pawowixigogibibag.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_off0000eee8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEE8	19684 bytes
SHA-256: `46b95ba0a79f8deb59fb6c9600a363681b21cdcce62b20bddf9a42536c0f7512`
`font_01_sfnt_off00012270.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12270	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013a87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A87	10536 bytes
SHA-256: `5eb754d1a9e527a2bb8b8ab3580839f6c1c4a2821032bbf7984db3cad8182ed7`

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