PDF malware analysis — malicious · a60c62d05ea23774

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 12:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: c1131fd19cef3080333a3de6ac6e3164 SHA-1: 7111705d62b280d59e3934342b91172f6b35f19e SHA-256: a60c62d05ea23774c602a67f45f9a36d5b0481b1f0e91c5ff4494905123a7ce2

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the execution of further malicious code or redirects the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://huntic.ru/uplcv?utm_term=best+stylish+fonts+keyboard+for+android PDF link annotation
- http://conhantaoankhanh.com/webroot/img/files/zagozelajivimemujomew.pdfIn PDF document text
- https://valgott.com/images/userfiles/file/66573808644.pdfIn PDF document text
- http://nadiadsa.org/userfiles/file/30954751086.pdfIn PDF document text
- http://1-champagne.com/blog_images/blog_/file/16671289080.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46efaca18---47963835186.pdfIn PDF document text
- http://fli.edu.mn/ckfinder/userfiles/files/wodulowigatod.pdfIn PDF document text
- http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/natadupigajezabuditi.pdfIn PDF document text
- http://grandrosso.com/js/upload/files/40220126798.pdfIn PDF document text
- https://projetovm.com/uploads/files/jesed.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/2f62f4ac397a01fda13913a3f616308c/94240465366.pdfIn PDF document text
- https://ljlconst.com/admin/images/file/nubekatilu.pdfIn PDF document text
- http://elmbbq.com/uploads/files/zemevakoxekeg.pdfIn PDF document text
- http://voszveszprem.hu/_user/file/94574677414.pdfIn PDF document text
- http://amghanoi.com/images/ckeditor/files/92469238550.pdfIn PDF document text
- http://patriabrno.cz/userfiles/files/67646651924.pdfIn PDF document text
- http://webinaris.training/ckfinder/userfiles/publics/files/zapabawomutifi.pdfIn PDF document text
- https://apexsafetyproducts.com/ckfinder/userfiles/files/ravosipurepobik.pdfIn PDF document text
- https://fiberglasssupplydepot.com/userfiles/file/56402506728.pdfIn PDF document text
- http://minuspk.ru/minuspk.ru/userfiles/file/lukenoxekanok.pdfIn PDF document text
- http://timebymtm.com/upload/files/36830381176.pdfIn PDF document text
- http://nhasachconggiao.com/luutru/files/34912152078.pdfIn PDF document text
- http://arcos-eff.it/userfiles/files/gexenenasajowizam.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_off0000dba0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBA0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f3b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3B7	10852 bytes
SHA-256: `a344509d72396c8117bea445ec1267bae925047f293c6284d0dd1527b659ac62`
`font_02_sfnt_off00010cc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CC0	18352 bytes
SHA-256: `058f8986c99faa713e5dd2eee1e7efe0c8003b42048fb975e6f2037cff8d3d3d`

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