PDF malware analysis — malicious · ea7e9e5e09b7db6c

MALICIOUS

PDF

75.2 KB Created: 2021-09-23 06:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: e3c67b9e48e039fba5fa65ee693c6c38 SHA-1: 05198831913cc2bce5ccb699f0416136d6ad5d7d SHA-256: ea7e9e5e09b7db6cfde5f20e148311daadf6ca28382a04805aab7bc3681cb6e2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and a high ML score, indicating malicious intent. It contains embedded JavaScript and numerous external URIs pointing to disposable domains, suggesting it's part of a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

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://philabc.ru/uplcv?utm_term=clash+of+orcs+friv PDF link annotation
- http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/57556897069.pdfIn PDF document text
- http://aygroupmuh.com/image/files/76434473235.pdfIn PDF document text
- http://constantemail.com/userfiles/file/1631889077bivajomipup.pdfIn PDF document text
- http://www.bluefashion.cz/ckfinder/userfiles/files/78248737913.pdfIn PDF document text
- http://vet-spb.com/userfiles/file/guvizuzugonolebalemam.pdfIn PDF document text
- http://diegogenna.it/userfiles/files/84555583297.pdfIn PDF document text
- https://newchat.xyz/js/ckfinder/userfiles/files/96615462150.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/fa953ed88b0d297e286b3f80b8b3561a/wulumomibebokul.pdfIn PDF document text
- https://theelementrama9.com/userfiles/files/zowuzoforezumov.pdfIn PDF document text
- https://nucamsa.es/userfiles/files/bovutikilajogajejosur.pdfIn PDF document text
- http://castel.lu/userfiles/files/zunosibumiwiba.pdfIn PDF document text
- https://fier-forjat-valimet.ro/ckfinder/userfiles/files/nulanigukeligevef.pdfIn PDF document text
- https://rafaela-motores.com/userfiles/file/suseviguvivukataxofiwera.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1bbaed5f1---zujiba.pdfIn PDF document text
- http://kbcsisa.com/upload/fckeditor/file/47278859700.pdfIn PDF document text
- http://swiss-ex.com/images/blog/file/12377197872.pdfIn PDF document text
- https://profitaler.com/UserFiles/file/9677584803.pdfIn PDF document text
- https://sunpower.lv/ckfinder/userfiles/files/99332948582.pdfIn PDF document text
- http://sinice-rasy.cz/files/file/nisizafivesaxuxoture.pdfIn PDF document text
- http://alexdisinfestazioni.com/userfiles/files/92658470711.pdfIn PDF document text
- http://bpsstudio.hu/uploads/tinoxofuvofivame.pdfIn PDF document text
- http://electrogalicia.com/electrogalicia/recursos/archivos/pavexisivatilef.pdfIn PDF document text
- http://ptk-tent.ru/userfiles/file/83168621283.pdfIn PDF document text
- https://mekongtransport.com/upload/userfiles/files/wuboresepuxut.pdfIn PDF document text
- http://gorisum.net/fckeditor/upload_file/file/felobajidetuz.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_off0000c372.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC372	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000db84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB84	16968 bytes
SHA-256: `3751a36fdd0b3412d8dc2f2e694c1330ac86868a3cd64cc4792c961c8337eeaa`
`font_02_sfnt_off000107d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D6	10196 bytes
SHA-256: `31491c36395b5d5d7cbb3f5ea155b0a6229209ccc03f482275dcf41a6b98cc87`

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