PDF malware analysis — malicious · e15328be49bd7f9a

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 00:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: b6a5aee27fcd09100b1b0b474b825d18 SHA-1: c0bbad8bf1e15862f4d42c48dcf1ed6c2635e4e2 SHA-256: e15328be49bd7f9a853dc453de98ebd4665485449255514cc555148f78dcaa82

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the PDF is part of a link farm designed to obscure malicious destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://tunecharts.com/userfiles/file/41119051758.pdf In PDF document text
- https://iva-vietnam.com/userfiles/file/xovobewagixogufediwufoga.pdfIn PDF document text
- https://groupburuemas2.com/contents/files/roneladutow.pdfIn PDF document text
- https://tidaksusah.com/contents/files/81923168089.pdfIn PDF document text
- http://mobitransjogja.com/files/60884990340.pdfIn PDF document text
- https://dzido.pl/userfiles/file/wugunovexekadagi.pdfIn PDF document text
- http://noithatlekhanh.com/Images_upload/files/losivimi.pdfIn PDF document text
- http://techbis.pl/files/file/65543975735.pdfIn PDF document text
- https://nicklason.se/ckfinder/userfiles/files/gugubaribuguxixutenu.pdfIn PDF document text
- http://debandhelder.nl/ckfinder/userfiles/files/xazazajuverekib.pdfIn PDF document text
- http://ecohort.com/userfiles/files/5092640544.pdfIn PDF document text
- http://zatoodesign.com/userfiles/files/21809951723.pdfIn PDF document text
- http://camel-republic.com/media/userfiles/files/kezokudeviwom.pdfIn PDF document text
- http://chinazzjx.com/d/files/33025452027.pdfIn PDF document text
- http://djpress.pl/Image/files/tuketifonejudegizixazojen.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c31eb06a8---4857804921.pdfIn PDF document text
- http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10034707590.pdfIn PDF document text
- http://yournamebadges.com/withyourdog/cms_uploads/file/papovivasi.pdfIn PDF document text
- https://kaimano.it/file/96298824884.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613153d1bb141---borojagej.pdfIn PDF document text
- http://upakuika.com/img/file/padosenebilewuwu.pdfIn PDF document text
- http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/20353450287.pdfIn PDF document text
- http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/vovigebuvorafasiwoxipa.pdfIn PDF document text
- http://mackyz7automotive.com/js/upload/files/xakiwidozofefigubujifiri.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=on+aphasia+freud+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_off0000b0e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0E4	16660 bytes
SHA-256: `3aa25cde5ec4fcac8f7a60583b4a68ae961c815fc9c5a151137b5a7d3ba674bf`
`font_01_sfnt_off0000db6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB6A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF381	10456 bytes
SHA-256: `68ea561802fb0adaf0acc113933862b3aca44942f9d3083d32a7c5951dd5b28b`

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