PDF malware analysis — malicious · f24767a5650a70c4

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 13:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 3e2f84b29b77b4e481d7fa276d6e9708 SHA-1: 0eb627aae32a38216cc26b5c6c1b667475e073c8 SHA-256: f24767a5650a70c4e09b18c1d4dde9480413f706646613fc91620afb3f85b099

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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://cathugo.de/res/wysiwyg/file/60213868050.pdf In PDF document text
- http://sakuragiramenandsushi.com/uploads/files/soloma.pdfIn PDF document text
- http://visit-pune.com/userfiles/file/gezota.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/14164c14106f226cd0eedd346d0da8c2/sotifusipatopebese.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/6e3a30135b527f6dc5996741cbea4f5f/visumobavikevabulut.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/833b8b564ff6d8b6ec756e71b519b3c4/numotibiraposikebalite.pdfIn PDF document text
- http://studiofranzoni.eu/userfiles/files/sopiluvipazisas.pdfIn PDF document text
- http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab5c8cd5d6---85530286795.pdfIn PDF document text
- https://vico-real-estate.com/ckfinder/userfiles/files/89304032601.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608300aa4bed2---xudimew.pdfIn PDF document text
- http://bienbao.org/uploads/files/92088169220.pdfIn PDF document text
- http://tovicetour.com/FileData/ckfinder/files/20210701_407955743258E001.pdfIn PDF document text
- https://atamergranit.com/userfiles/file/dawuwipemevuvulakinuralo.pdfIn PDF document text
- https://upbfassadenbau.com/upload/file/74121334591.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/9c28df12cb90120dc4cfdf9a6872be0b/7821990505.pdfIn PDF document text
- http://www.nbc.com.vn/ckfinder/userfiles/files/jisufe.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/8bc9ae2890ec2ff6b46cb17da22591bf/kimowapetubitadegit.pdfIn PDF document text
- http://a-pluset.com/userfiles/31148059733.pdfIn PDF document text
- http://uchid.com/uploads/file/8676847980.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba88887a0fa---48772804332.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9be3e89c57---56458302671.pdfIn PDF document text
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/41avm2cc8p0t7mnr1uk7r2dsro/tuximox.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/785267783bfc79490a7def2f2d0adc5c/1160285288.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/g8lqul0iidn67emn9pjfshm5s3/malebi.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cccee08af7---xagetotidotipeko.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e2e2aa90---83884086990.pdfIn PDF document text
- http://opuspoint.com/ckfinder/userfiles/files/3381404014.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=major+systemic+arteries+and+veins+of+the+body+worksheetPDF 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_off0000da0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA0A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f221.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF221	11316 bytes
SHA-256: `2f38acb2cc0444f27106796c398bd9e2953733068b9cd39d9c022d12e1a3a7a9`
`font_02_sfnt_off00010c9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C9E	17224 bytes
SHA-256: `faddaf7c399cbc6fa64804deef2c3eba4e7acb09c538e29b040c45083b8ea07c`

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