PDF malware analysis — malicious · 10e5f2fd83159330

MALICIOUS

PDF

83.7 KB Created: 2021-09-20 05:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: bae01b9a5c00282d0e40e592edbf8357 SHA-1: 979c32a65603c3cad01c24fedccfdd68c63acf5a SHA-256: 10e5f2fd83159330318f9c2e60e2d82d8905440e3019386ee1c49e1fa09784cd

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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://bandotrading.com/uploads/file/bopajovebituzomupok.pdf In PDF document text
- https://atpl.aero/ckfinder/userfiles/files/dexupowefafejifovara.pdfIn PDF document text
- http://rkenterprisesonline.com/FCKeditor/file/disipu.pdfIn PDF document text
- http://studiodabo.eu/userfiles/files/11025385343.pdfIn PDF document text
- https://forumhrdbekasi.com/webroot/userfiles/files/dukabizanelizonipu.pdfIn PDF document text
- https://movimientofamiliadejesus.com/images/uploaded/file/samabemamoxupasibimuv.pdfIn PDF document text
- http://yogo110.com/userfiles/file/65191171051.pdfIn PDF document text
- http://ficfart.org/userfiles/file/62921414648.pdfIn PDF document text
- http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/25782104426.pdfIn PDF document text
- http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210911_044857.pdfIn PDF document text
- https://apaman.ti-am.jp/js/ckfinder/userfiles/files/46850078906.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613398a429896---nidanejarixegirab.pdfIn PDF document text
- https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/21774433041.pdfIn PDF document text
- http://megalaserasia.com/upload///52864032097.pdfIn PDF document text
- http://carzip.biz/files/uploads/files/10357890331.pdfIn PDF document text
- http://phunphu.com/userfiles/file/xatebubupofovigaxif.pdfIn PDF document text
- https://kingdomofgodmn.org/userfiles/files/63517332545.pdfIn PDF document text
- http://archetipoingegneria.it/userfiles/files/bisugaze.pdfIn PDF document text
- https://nusantarabet4d2.com/contents/files/dugiwurodajenadiruwuni.pdfIn PDF document text
- http://studioassociatoemc.com/userfiles/files/24548685380.pdfIn PDF document text
- http://acecaalcoy.com/userfiles/file/96415679444.pdfIn PDF document text
- http://stmrcstvm.com/userfiles/file/58567754639.pdfIn PDF document text
- http://coming-c.com/userfiles/file/29684634784.pdfIn PDF document text
- https://pchome.uzai.ca/upload/files/matuperusase.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=esl+intermediate+reading+comprehension+worksheets+pdfPDF 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_off0000e113.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE113	11228 bytes
SHA-256: `dc0d8389883db6dccd133b73a71f394729a186008d75202551d21df849444cbd`
`font_01_sfnt_off0000fb06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB06	17564 bytes
SHA-256: `466de6d6d6bf7d98328d8036b0a172d4db5fabf9f8c9fb78ca21b95b5f5d0f54`
`font_02_sfnt_off0001285b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1285B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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