PDF malware analysis — malicious · 1e4bbcee0f0fd208

MALICIOUS

PDF

67.7 KB Created: 2021-09-30 23:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 86ba5d82517eb24cb9f9cdadc1cca604 SHA-1: b8d918ce4fbfc0caf000c76531cd8e21bd0971ff SHA-256: 1e4bbcee0f0fd208e1008e56cfe8cf02a2959628d937c369e263d15933030fb6

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file with embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs, many of which point to disposable domains and appear to be part of a link farm. The presence of embedded JavaScript and numerous external links strongly indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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://krisoc.ru/uplcv?utm_term=bangla+choti+top PDF link annotation
- http://status-go.net/gfx/userfiles/files/ronobuxumivel.pdfIn PDF document text
- https://ipekyolumedya.com/resim_galeri/file/vafefalezevigusidunasi.pdfIn PDF document text
- https://dolphinsolutions.net/ckfinder/userfiles/files/vexotafimeka.pdfIn PDF document text
- https://cafesca.mx/ckfinder/userfiles/files/lidigajeximejixavor.pdfIn PDF document text
- http://twtime.com/uploads/files/202109090447058490.pdfIn PDF document text
- http://interroadholland.nl/userfiles/file/supirasen.pdfIn PDF document text
- http://industra.sk/userfiles/file/foxuzefalijilivugosilixi.pdfIn PDF document text
- https://longhoang.vn/upload/files/32204488739.pdfIn PDF document text
- http://kingsfinancialconsulting.com/userfiles/file/20477368390.pdfIn PDF document text
- https://mimpishio2.com/contents/files/zubuzutidivamuzu.pdfIn PDF document text
- https://oriolefashion.com/ckfinder/userfiles/files/94214131693.pdfIn PDF document text
- http://wanyuantemple.tw/userfiles/file/51564427642.pdfIn PDF document text
- https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/a6stkfkfn98r1r5kb4h947h60b/8295656697.pdfIn PDF document text
- http://boden.boj.se/uploads/userfiles/files/4016555972.pdfIn PDF document text
- http://constantemail.com/userfiles/file/1631931614zagawa.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e7f065bce95b85d139552cf095c18df5/kupatojovexefi.pdfIn PDF document text
- http://reklamaopole.pl/userfiles/file/48413984729.pdfIn PDF document text
- http://jiendurancecoaching.com/ckfinder/userfiles/files/83696115523.pdfIn PDF document text
- https://gazeta-msp.pl/user_files/File/2657857229.pdfIn PDF document text
- http://gmkms.net/upfile_editor/2021/files/41818635822.pdfIn PDF document text
- http://kadh.kr/bobod/upload/file/33197240277.pdfIn PDF document text
- https://ddnepal.com/assets/userfiles/files/kujebuwi.pdfIn PDF document text
- http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/89181393482.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_off0000acaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACAA	10304 bytes
SHA-256: `a0e30d150629495e1a3e6ccc36e03173c9eb39721a75411abc11e9b1b0d0a52f`
`font_01_sfnt_off0000c3cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3CF	14652 bytes
SHA-256: `80d199e025e32f47e18ee40821a55e9e997dcde9a2ef23dd1af06e7e6268ecb1`
`font_02_sfnt_off0000e806.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE806	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.