PDF malware analysis — malicious · ce4e383ede37f317

MALICIOUS

PDF

88.9 KB Created: 2021-08-10 21:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 4fc5304f01b76ec34eb9e9a2b397f91d SHA-1: d2e7d83754f74f5d37fd59cb702b57d3b3d74958 SHA-256: ce4e383ede37f31745f3d2b9f1d9acd52c31e251c6a6c8f48b34713acabf3964

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9986

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 http://mariopresto.pl/userfiles/file/jelemis.pdf In PDF document text
- http://polletnv.be/uploads/files/58619255951.pdfIn PDF document text
- http://yourtruck.be/upload/ckeditor/file/82178351974.pdfIn PDF document text
- https://mandarinusa.com/userfiles/file/1627953479.pdfIn PDF document text
- http://aristosaigonhotel.com/uploads/files/60630850853.pdfIn PDF document text
- https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081e50e6950e---lizuwolaporal.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c694703c5a---bunepuxesiguronovifojov.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f9a430c5d---38901431149.pdfIn PDF document text
- http://henskeschildersbedrijf.nl/upload/xaraxofajapufuteneji.pdfIn PDF document text
- http://sgrappresentanze.eu/userfiles/files/bizeletebofu.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2a9273a064d10a72fd9b3e727c478da8/36735373954.pdfIn PDF document text
- http://ajtoablakcentrum.com/_user/file/butufi.pdfIn PDF document text
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607e35bfef6e1---19742442462.pdfIn PDF document text
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/9b86315ff106b142e6b1691e53dc3d0a/9951781091.pdfIn PDF document text
- https://okud-istra.hr/userfiles/file/66923030582.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b54a631a4---16363708807.pdfIn PDF document text
- https://intervalhousehamilton.org/ckfinder/userfiles/files/87837878677.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607412cdcb457---75403966439.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/9d4d7eac2157d01e91f2c7fdeaa03d52/rurakuzid.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/hc23hotpgsvgtc5khgj86dc2lm/87511374700.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/35ds94kn2v7bb5vjum0o46npod/25188725579.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/f3c12c25cadc9788e0da53124b4b5697/24292629300.pdfIn PDF document text
- http://hferrynetworks.com/FileData/ckfinder/files/20210803_4D6242D8E496DF93.pdfIn PDF document text
- https://maintogelonline.info/contents//files/52426772357.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/husslp22ti9btjnfs2jfg0i8n5/86227602393.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=descargar+solucionario+de+analisis+estructural+hibbeler+8+edicionPDF 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_off0000f04e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF04E	18440 bytes
SHA-256: `f8d0bf53c3b51a352041d1bfcf35d31d40b0f2644e469359656b732ff3d4ba7b`
`font_01_sfnt_off0001206b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1206B	11096 bytes
SHA-256: `47a471c3fac950b5b3dff1f1fa64f4b6454ad25f767852ec4a3c5ff61dd0d446`
`font_02_sfnt_off00013a06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A06	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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