PDF malware analysis — malicious · 69c30edbb90541e8

MALICIOUS

PDF

90.4 KB Created: 2021-06-30 23:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: b26747f77d06747693c39a0152c7bd3a SHA-1: f88e4e37c567de3007fd188842311e877afb9ae5 SHA-256: 69c30edbb90541e8830cb0cd88bea7d0456236e36ddc6970a2a002ebe5d1d885

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. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

Heuristics 6

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.
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://inwebjor.ru/uplcv?utm_term=do+sound+waves+refract PDF link annotation
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c043871eed3---61771340903.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f05a6c9315---2920259189.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/38e76b3171e8fb37e106a32eab6ed388/40657359257.pdfIn PDF document text
- http://dashoernerboot.de/userfiles/losufoku.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093dca698d4a---tubamixuretoposadujixarug.pdfIn PDF document text
- https://ivanda-commerce.hr/userfiles/file/82531528026.pdfIn PDF document text
- https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763b833a0d6---linedo.pdfIn PDF document text
- https://paklya.su/design/img/upload/file/20420694829.pdfIn PDF document text
- https://curewelldiabetes.com/userfiles/file/wozerizux.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c9669249932---zaborewenuzifizalufoto.pdfIn PDF document text
- http://jfkanacon.org/data/userfiles/files/mozane.pdfIn PDF document text
- http://soupworld.de/upload/file/3112836320.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/cfa8f10d19a605def8503b87d2e05979/90373649724.pdfIn PDF document text
- https://stcc-sa.com/motakamel/Ups/files/89564935851.pdfIn PDF document text
- http://minhledtran.com/luutru/files/gazubazogaleguxeto.pdfIn PDF document text
- https://cuisinescartier.ca/upload/editor/file/77951791818.pdfIn PDF document text
- http://jar-ted.pl/file/52903695444.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/8ef05d3lr0a1qtrttiido06tpr/50115161125.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce77aa071b---siwakal.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf8ab3bc7---95447119863.pdfIn PDF document text
- http://vamaconsulting.sk/userfiles/file/49183029364.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf96fe9071---mawotumez.pdfIn PDF document text
- https://icbacademy.com/upload/files/gasenutezavusokakofat.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec6419b824---famuwumuxijajeluzetuwi.pdfIn PDF document text
- http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/baterufedegifirekuvik.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072c2186dd8f---mijunobaf.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000fb26.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xFB26	17808 bytes
SHA-256: `a9684cce4c87ea2409609c3358b0971096cda0e05fe365c94d1475dcf301301d`
`font_00_sfnt_off0000e315.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE315	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011680.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11680	10584 bytes
SHA-256: `44f6ee807eb61e19df3beced286913d9d98d03518b7c7441f3e2c36d5947c32a`
`font_03_sfnt_off00012ee3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EE3	17220 bytes
SHA-256: `0870b2b772d0b88d528ae0a8bea7bd34a9c150a7ed600f4748ddb269e738eca1`

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