PDF malware analysis — malicious · 668993d075249901

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 13:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 0cc95c143358281fa1799c387b79100b SHA-1: 88f0ae51a530d1b271b6d2a2e1eecaff09b6a803 SHA-256: 668993d0752499019d11ee91c8445305d35f2efca400836146e2095afe632e04

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly suggest this PDF is a phishing or malware distribution vehicle. The presence of embedded JavaScript points to its use in executing malicious actions within the browser or document viewer.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://irlanc.ru/uplcv?utm_term=black+butler+london+bridge+is+falling+down+episode PDF link annotation
- https://aspirans.com/files/file/vebogidoji.pdfIn PDF document text
- http://qiangka.com/ckfinder/userfiles/files/71623110785.pdfIn PDF document text
- http://sedaciesupravy.sk/media/file/kuzetatesifoda.pdfIn PDF document text
- https://takarasushimn.com/userfiles/files/jasojemapadudogura.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136176ad8e77---warudatomosebixeg.pdfIn PDF document text
- https://rjpexport.com/files/muxolulagafatetezujev.pdfIn PDF document text
- https://sfasg.jp/js/ckfinder/userfiles/files/mupalajakezosijoxivojoxe.pdfIn PDF document text
- http://www.jfac.kr/ckfinder/userfiles/files/67426472443.pdfIn PDF document text
- http://armanetti.com/images/21405617791.pdfIn PDF document text
- https://profipreklady.cz/www/ckfinder/userfiles/files/putujibi.pdfIn PDF document text
- http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/zesifawibamawi.pdfIn PDF document text
- http://spalovnachemolak.sk/userfiles/file/gokanok.pdfIn PDF document text
- http://gryfarmerskie.pl/pliki_wyswig/files/deburarokenizinoluwuko.pdfIn PDF document text
- http://camberwelltaxi.com/survey/userfiles/files/2734891167.pdfIn PDF document text
- http://tentimesneedlehill.com/UPFILE/userfiles/files/31253128851.pdfIn PDF document text
- http://shanghaicruiseparty.com/uploads/file/29240339351.pdfIn PDF document text
- http://benthanhsgfarm.com/images/uploads/files/ruragifefakupewik.pdfIn PDF document text
- https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/lapolawufasaduzegupu.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/8d092731777e9814455b487e681dc531/98231381221.pdfIn PDF document text
- https://yogaspotny.com/userfiles/file/xulebunasusevejemere.pdfIn PDF document text
- http://wxhsbl.com/ckfinder/userfiles/files/20210914_161043.pdfIn PDF document text
- https://shiokuda2.com/contents/files/dojodaramegijajapopidu.pdfIn PDF document text
- http://studiotecnicoprato.eu/userfiles/files/89235235867.pdfIn PDF document text
- http://aedelsur.com/contenido/files/56900088273.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_off0000c3b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3B2	19172 bytes
SHA-256: `f396d4b30aebc2ce127cb491b0beda90b79db361eec700498819d2e946384c53`
`font_01_sfnt_off0000f4de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4DE	11264 bytes
SHA-256: `266e3cf68730ca5c7add94600eca30dc59fa88c3a6164943fd2d6f8d32adc178`
`font_02_sfnt_off00010f1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F1E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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