PDF malware analysis — malicious · 24d33ce3321fa964

MALICIOUS

PDF

92.2 KB Created: 2021-07-14 03:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 5db493ac98791283521782831df31e4e SHA-1: 317ea0f13acb6aa8efc3a6128ca75a91f94b1896 SHA-256: 24d33ce3321fa964451c9e10309c0cacbfedccb2eccdfab242ea50b072f96e0d

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a high number of links to external sites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. Crucially, the document includes a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell, a common technique to download and execute further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945ace22c6d---nabeba.pdf In PDF document text
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/mrgr20eian580nbr7egfmikchg/3132160278.pdfIn PDF document text
- http://okzawidow.pl/img/upload/files/24299177372.pdfIn PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ae8c0df4b9d4a055e918716f2f8db9f1/56149142021.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160739f7bb1414---75389184550.pdfIn PDF document text
- https://delaneyllc.com/ckfinder/userfiles/files/35057125722.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072eea5cb5a6---25189520599.pdfIn PDF document text
- http://teormech.ru/teormech/usrimg/file/70182819842.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e7319c6f9---42575145788.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc79428c63---59108841618.pdfIn PDF document text
- http://ildungrice.com/fileupload/fckeditor/file/molerorusegeropulu.pdfIn PDF document text
- http://cec-intl.ru/app/webroot/files/file/75854773246.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a577f563db2---98662813866.pdfIn PDF document text
- http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kibuponater.pdfIn PDF document text
- http://knshzj.com/CKEdit/upload/files/fejabezamifere.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/0e435f2fa79639ae91951165bbd34f07/gevojudegukixirijosunujas.pdfIn PDF document text
- http://stacjaregeneracja.pl/userfiles/file/25472195924.pdfIn PDF document text
- http://studiomalpocher.it/userfiles/files/61611812561.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b67fc28f2---12101734135.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4b0fde77d---lelizurupexojegel.pdfIn PDF document text
- http://spreewaldatelier.de/img/editor/file/bavanisoxasodemivali.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16079a48a9d58e---5165355966.pdfIn PDF document text
- http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/5nft887fp1hbnse96j8ib3ord0/1176775995.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=promo+codes+for+lords+mobilePDF link annotation
- 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_off000103ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103EE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011c05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C05	10416 bytes
SHA-256: `6da00bdb41cd9e10d0e318c4d42755612381d89f4fc91b1b3733dcefca529c2f`
`font_02_sfnt_off00013390.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13390	18504 bytes
SHA-256: `9db8ca0d796db0a8af90dd8f170e725f7e4074884f9d5be81b6be58e1cd43f54`

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