PDF malware analysis — malicious · 8fe37c48c66ca0a2

MALICIOUS

PDF

81.5 KB Created: 2021-08-01 03:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: fb915d9b3feb6ef22099e0f3d318daab SHA-1: 74d92d4b3828883f3b9189bb2d7dd8825badce2b SHA-256: 8fe37c48c66ca0a24e25051f766ac0d330d269555d0843dc566dab9f341707f1

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing and trojan delivery mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick users into installing software, a common social engineering tactic. Numerous external URLs are present, likely serving as landing pages or download sources for malicious payloads. No scripts were extracted, but the PDF structure and embedded URLs suggest it's designed to exploit user interaction for further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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.
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://wastran.ru/uplcv?utm_term=prodigy+hack+github PDF link annotation
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0665985e82---51000271226.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609be99900c4a---fumurobopagava.pdfIn PDF document text
- http://bonfiremadigan.com/uploads/fckeditor/file/kipegusurufagim.pdfIn PDF document text
- http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/bumij.pdfIn PDF document text
- http://zhodnoceni-penez.cz/is/images/FCKeditor/File/65054574079.pdfIn PDF document text
- https://mintowncoffee.net/uploads/images/files/bitun.pdfIn PDF document text
- https://majorsagilekvaros.hu/uploads/file/bezuwaguludexi.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3481880a07---nabipibepe.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed753a8a7a---5524271549.pdfIn PDF document text
- http://deaprogettazioni.it/userfiles/files/4285592081.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160878c3586156---40792732579.pdfIn PDF document text
- https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/234829bf5d4d8c709c32893560a6af43/97258406135.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///fobugeresizufumizukiso.pdfIn PDF document text
- http://whatifitspossible.com/ckfinder/userfiles/files/38891119891.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/627b263d391688a4eaa77517ce9e8ce7/93186163996.pdfIn PDF document text
- https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/434aa1a458edf8a1197b3b89e7b5609c/20176629427.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/c793r4dc62tek4u060iitgfkdg/bazegigisoxazin.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098aed37fe81---nijofadadipigonamilet.pdfIn PDF document text
- https://tolgyesvolgy.hu/userfiles/file/wowikedezaxebesawubewolu.pdfIn PDF document text
- http://kursadowicz.pl/Upload/file/5007955203.pdfIn PDF document text
- https://noblacklist.pro/web/img/podborky/files/votedajejurixinisonoluw.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8f5b63962882e8db3a4a7848d80ee41d/88340172567.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607d391f35281---22719427669.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_off0000d911.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD911	10648 bytes
SHA-256: `3a6f16680f57d270dc431e5ca8fccb5b60f9ed18b9f96eec31f6e461ad4d58a8`
`font_01_sfnt_off0000f164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF164	17576 bytes
SHA-256: `bb77300e6ae7c49c0028a5394fc189fdb1fb513be2acbfd5d53dc536a1f47cb1`
`font_02_sfnt_off00011f92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F92	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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