PDF malware analysis — malicious · 4b127f17cf2c60d9

MALICIOUS

PDF

89.0 KB Created: 2021-08-12 14:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 40644c1e804be49e2cbbb490564786b2 SHA-1: eff016e739978da673ef5dd0ac246e51575381e4 SHA-256: 4b127f17cf2c60d972a77c85c4270c7ec67c8d5b9c7dc2843b4b292545e427ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://master.plus/wp-content/plugins/super-forms/uploads/php/files/eba90bf09de52c1d57c112f45f796941/tegup.pdf In PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6847357e3---zogomowonimo.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962bd17e998---mubuzilozegix.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071aecfe850d---27506041873.pdfIn PDF document text
- https://loctra.net/userfiles/file/gofadotaja.pdfIn PDF document text
- https://fotobolfestmeny.hu/mvc/userfiles/file/6932999033.pdfIn PDF document text
- http://sva-jeanroze.com/xmedia/file/rizixomagazimewepogof.pdfIn PDF document text
- http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/b7633bf02ecdcefec5d22c9ada33eca0/vasefak.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/26448913893.pdfIn PDF document text
- https://everestart.com/images/stories/file/14881604074.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce58cbbb09---40201430498.pdfIn PDF document text
- https://akemi.ro/hirek/file/75580339064.pdfIn PDF document text
- https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/3m2eu58kvcbe95gmrogtmj0b0u/58582734998.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/45872f64036f89a8e541902b02e295d6/21386684088.pdfIn PDF document text
- https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/hb5mcctugv743612id0rfr59ra/8633962627.pdfIn PDF document text
- http://www.cerathai.com/image/upload/File/470861546.pdfIn PDF document text
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a75a3a4220dd75835a9a2710485ab613/36208698136.pdfIn PDF document text
- http://askort.pl/Upload/file/3930836282.pdfIn PDF document text
- https://taevlingar.se/images/pages/file/dademadexugemelojoruga.pdfIn PDF document text
- http://umrllc.com/userfiles/files/jegunilinuzomoxapolerob.pdfIn PDF document text
- http://aliceinformaticasrl.com/user/pages/vozuja.pdfIn PDF document text
- http://gourmethousemacau.com/UploadFilesfile///52991239490.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a538eb037fc---66666944854.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ptv+sports+live+match+2021+videoPDF 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_off0000f5bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5BF	16864 bytes
SHA-256: `98e49f78bf46233474de1f0fa5c2afea0a156043cfe0497a10602d0d69a51fa4`
`font_01_sfnt_off00012196.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12196	11036 bytes
SHA-256: `5cee3a12e0b7f478ec29255a5a792495f3ba9de7502d0f85a8fef26a452de0c2`
`font_02_sfnt_off00013b61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B61	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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