PDF malware analysis — malicious · 923b3befb6c60b11

MALICIOUS

PDF

92.0 KB Created: 2021-09-08 12:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 96eac00d69c480a627e2cbb8f8c57522 SHA-1: 93c1136332dd1cbe3be4f201683b1bc18ce1524d SHA-256: 923b3befb6c60b11889e5f5ac96782c46aa58a3d573d5f0baa57a2d0854d6c45

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to lure users to external malicious content, aligning with spearphishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9906

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 http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7659e5f9c---fosejuj.pdf In PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/05e44af01e289863fb0cc6fe6193af6e/67035616873.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/jamulalevoguwepap.pdfIn PDF document text
- http://avandcie-energy.com/ckfinder/userfiles/files/66435637082.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100fd4115f68---20066348881.pdfIn PDF document text
- http://tlumacz-francuskiego.pl/userfiles/file/pigezapefavaberuvelonol.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a8354fe99---75941525096.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0de898f61.pdfIn PDF document text
- http://www.depomatrial.com/file/mixix.pdfIn PDF document text
- https://tenfci.org/userfiles/file/wumukulago.pdfIn PDF document text
- http://geoplan.su/userfiles/file/61370873888.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/5b752dec4d4d5226d1edb8a3bbf7772a/44683053583.pdfIn PDF document text
- http://etasystem.net/userfiles/files/gibilakitusovixof.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/2288121102.pdfIn PDF document text
- https://shevtsov-art.com/uploads/files/28114885133.pdfIn PDF document text
- https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/380cb1aa04eb5babb5935b522ec8417d/87528116535.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae23e8bc2---72991800368.pdfIn PDF document text
- http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/9g0od2tm63ev2scsrdfi845gcrgh09j5/2593590745.pdfIn PDF document text
- http://mawaevents.com/uploads/file/71542589887.pdfIn PDF document text
- http://bukharajohnscreek.com/sites/default/files/file/nuvudakovebibosenuba.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d23f482d41---ragutoweso.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16090a9ad65031---23236138420.pdfIn PDF document text
- http://asfalon.com/__files/file/79149503432.pdfIn PDF document text
- http://www.tractortools.cz/ckfinder/userfiles/files/85417840659.pdfIn PDF document text
- http://sochi-polyana.com/ckfinder/userfiles/files/korelelolavu.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/58accd7e41d645aefcdfb8c07edaa35c/jikolaxategi.pdfIn PDF document text
- http://sun-green.de/ckfinder/userfiles/files/nafumowazeserigajab.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=importancia+de+la+cultura+organizacional+segun+autores+pdfPDF 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_off0000fbaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBAA	11076 bytes
SHA-256: `359988d66e62eb5d5861185948febd400a115e701d61b366f09c6037fa185b3e`
`font_01_sfnt_off0001153b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1153B	19712 bytes
SHA-256: `a11999807f6b51a829c580b55e169d2f9108db294df4a55c39d14353f118eaf2`
`font_02_sfnt_off0001472c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1472C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.