PDF malware analysis — malicious · 9427a5992f15484d

MALICIOUS

PDF

91.5 KB Created: 2021-07-05 08:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 3a04dad626794defee571b4bf3250881 SHA-1: 2cdd1139b8ec48e9891f54739f3d65c1eab97852 SHA-256: 9427a5992f15484d549581ea9e2aea4deb894fa79215a0d8d37bdff7f340bb89

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm pointing to compromised websites, likely intended to trick users into downloading a secondary malicious file. The presence of a 'enable macros' lure further supports the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 8

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://cructi.ru/uplcv?utm_term=can+you+insert+a+pdf+into+a+word+document PDF link annotation
- https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/vdabe96s83203c15ifr3il2ou7/javobiden.pdfIn PDF document text
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/960270521f35f9f4dcef9999ddb03cc3/lulafurufuxe.pdfIn PDF document text
- https://artbynela.com/uploads/file/79184047894.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e403805cc8058f7da2d7ad6e5d9cada/gofidaxodidepukojo.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160838f147420b---38667690214.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/dd3db48909c372ce7ee970b1c06751b7/51711929687.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d694e4bbd57---53744685068.pdfIn PDF document text
- https://gulyaskantin.hu/uploads/frontend/files/vusatekeweto.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8b2cc62c---17889284596.pdfIn PDF document text
- http://grubstreet.ca/ckfinder/userfiles/files/tabanilixemanazatonugafo.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/13268529187.pdfIn PDF document text
- http://victoryelectricalsupply.com/ckfinder/userfiles/files/7749772940.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a192a0c6bc2---92975674380.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa1632b761---5108889270.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a018f823446---97210287771.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/fd02ae1a00019f4127b822b7f5515ba2/40232948618.pdfIn PDF document text
- http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607073ba42e51---87867585931.pdfIn PDF document text
- https://latework.cz/soubory/batuzotivorumowifevas.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/bc2662fad9dea61e49f8821155d00149/doxobeta.pdfIn PDF document text
- http://littlepearlbooks.in/data/eimages/file/dupilusixetigok.pdfIn PDF document text
- https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/5e831793e988414b53bab7543b772e76/kuvopigejerotisomij.pdfIn PDF document text
- http://yuha.be/_files/file/pibujiwejolejuxifotoxefe.pdfIn PDF document text
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082838454c8e---narikufolazumafosar.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160ae04166b482---11137924694.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/49u34fp5443apcb0jhfm12dl67/padegogexali.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_off000101c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101C8	17068 bytes
SHA-256: `d31012d7996785c1f218b92fb33f05ad16afada591a3061cc1eee298b05eed73`
`font_01_sfnt_off00012e24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E24	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001463b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1463B	11064 bytes
SHA-256: `352d5e3ae81e7dd37975e6ab10297cd44134d9523c6ccce0f56a0388b40ee860`

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