PDF malware analysis — malicious · f870b3ca3c2b7ca4

MALICIOUS

PDF

69.7 KB Created: 2021-10-04 03:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17

MD5: 1c4afc634c165e2460c48f0a2bf35b05 SHA-1: c55f7fd9822f2041c54093e26610a85f327ca05f SHA-256: f870b3ca3c2b7ca440fee3723a5cbc5d84b615151e5bd945f5aa892a727d85d2

154 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH

A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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://gdlejia.com/uploadfile/files/20210919_090631.pdf In PDF document text
- http://agrostroi-proekt.ru/ckfinder/userfiles/files/20134222502.pdfIn PDF document text
- http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/punimikawuz.pdfIn PDF document text
- http://unicaconsultoriarh.com/images/files/nowogibabi.pdfIn PDF document text
- https://stmpallet.com/ckfinder/userfiles/files/zevumapudubivagojojejukar.pdfIn PDF document text
- https://hexema.com/FCKeditor/file/bovulexuwo.pdfIn PDF document text
- https://hankilfood.com/upfile/files/wujobesosawilanotigoxu.pdfIn PDF document text
- http://hamdannepal.com/userfiles/file/48069863905.pdfIn PDF document text
- http://docando.es/js/ckfinder/userfiles/files/3812899980.pdfIn PDF document text
- https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0cebbc1be144fbae02f87aaaa6b91ffa/67618188284.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/aac2cbbb34834a141e36017c615e6584/37606646622.pdfIn PDF document text
- https://073741256.com/uploads/files/202109040913157515.pdfIn PDF document text
- http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/vijufewujo.pdfIn PDF document text
- http://izhar-energy.com/userfiles/file/91523518778.pdfIn PDF document text
- http://clubselectionvoyages.net/images/file/detibazasovapufazikilaxom.pdfIn PDF document text
- http://avandcie-energy.com/ckfinder/userfiles/files/48175398710.pdfIn PDF document text
- https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/puxokufapitifaxujidemu.pdfIn PDF document text
- https://nurdagihaber.com/resimler/files/tubibavowizimedibowonolad.pdfIn PDF document text
- http://kondicionery-lobnya.ru/upload_picture/file/xikajirefatifumusul.pdfIn PDF document text
- https://cobaltinc.org/userfiles/file/jilokadebagimoxixunal.pdfIn PDF document text
- http://tianlanlawyer.com/filespath/files/20210926192934.pdfIn PDF document text
- http://ainut.fi/userfiles/file/rojakod.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5a66483dc26e9e76051556a641036e62/gejimufalewonevar.pdfIn PDF document text
- https://ladymamashop.com/uploads/files/202109090934006023.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=set+a+timer+for+2+minutes+and+15+secondsPDF 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_off0000b1bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1BF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c9d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9D6	11072 bytes
SHA-256: `19620fc7b15e20cbbaa8c16807def97819e92496ce3b2491e5fe6b620d761251`
`font_02_sfnt_off0000e3bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3BD	14740 bytes
SHA-256: `72d00fcf6094540d42ccfefb717ee3f796b949d4d859c950de4b949dc0ec08f6`

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