PDF malware analysis — malicious · cefbe6d04d82e9a6

MALICIOUS

PDF

86.4 KB Created: 2021-07-01 23:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 00ac62fc6415fca0a06c7e882933882d SHA-1: 9a59bdbb07a75b9ea94a767da3b85311e3b87669 SHA-256: cefbe6d04d82e9a6ba546c98329bad1c8656e28e220fd849fe3a063abbef2b83

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The embedded URLs, such as 'https://queure.ru/uplcv?utm_term=sekiro+die+twice+system+requirements', are likely used to distribute further malicious content or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://queure.ru/uplcv?utm_term=sekiro+die+twice+system+requirements PDF link annotation
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160949dd86186b---jerewosepasijomu.pdfIn PDF document text
- https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/2c8ef3407d7d9762a73025806633d737/8553129945.pdfIn PDF document text
- http://standartbio.com/fckfiles/file/45883468921.pdfIn PDF document text
- https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/e1bf039ce192e0a78868cc5d63428352/40049195658.pdfIn PDF document text
- http://manavpublicschool.org/manav/userfiles/file/25830780323.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/92996969965.pdfIn PDF document text
- http://rotang.net/userfiles/file/nuxemolale.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/jowevivadas.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/vqlfjqdt1q9mbrcc3div0h6b70/92013410101.pdfIn PDF document text
- http://beiwendq.com/userfiles/file/soxopolasikofovugilisewu.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/36f47d124e988e23bfaa73ed7015809e/diladefunerebed.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083bae60e043---fujolozuxulibi.pdfIn PDF document text
- https://sonarmusic.hu/up_image/file/89044781382.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081562d3229a---25129867153.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb0d2255e---rasojoboxikej.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160833cc30f83a---7986041186.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/9df87d78f2e23a61dac0fb84f917446a/64371239765.pdfIn PDF document text
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/5bellg5q0ouehgld305g4kjrar/xusutuvuju.pdfIn PDF document text
- https://sokolzgierz.pl/web/uploads/files/97605681413.pdfIn PDF document text
- https://stratasphere.online/userfiles/file/29200139537.pdfIn PDF document text
- http://lapenya.cat/imgjovesnaves/file/lelefuxuvaxoluni.pdfIn PDF document text
- http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/9907191771.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e0bb0819cfa1e1321a7ee1ed41e46478/vokepikiroredaxitaxe.pdfIn PDF document text
- https://airbays.com/userfiles/file/muvobenevedoweridotokel.pdfIn PDF document text
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/e6vmk94tl53hbi0muo3lo1ssee/bujitofuzesofunutijopopa.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_off0000edd8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDD8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000105ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105EF	10936 bytes
SHA-256: `3d1589cfefc344ea79798200b79724d5d9f714ef1fbb5960ae645a3e64da5c66`
`font_02_sfnt_off00011f22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F22	17128 bytes
SHA-256: `3a7cea7a8d746e0feca95eea3080537d7c305fad68ff1f505818bbd89de99165`

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