PDF malware analysis — malicious · a03c8a6cf4de6423

MALICIOUS

PDF

100.1 KB Created: 2021-08-01 03:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 473bd658b28af5ff4431d757d20c3af8 SHA-1: b36fbd2a249ae9d97a4d77c72441959523ad71cc SHA-256: a03c8a6cf4de6423fe090240b336566d101d48cae03c18cc3ae949357f13012a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to URLs hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of external URIs and link farm heuristics indicates an attempt to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

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://sujitonweb.com/userfiles/files/56814303836.pdf In PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/06a3080a3ba0f097c86c8cff7002d9aa/21426637380.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///reludola.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a244a0210af---18492038117.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/68027667737.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609837a0a8cb5---xuwokoxoruxixuneg.pdfIn PDF document text
- https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/g01flikqv328p68qcq3qrj9oi6/gilejifabibo.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090047504dae---lunezejimetevitujomujog.pdfIn PDF document text
- https://clifestyle.net/uploades/userfiles/file/gitabedigapebewutez.pdfIn PDF document text
- http://wadirumshootingstars.com/userfiles/file///bulinojifuxizodolari.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094592b9058f---pibumuwi.pdfIn PDF document text
- http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/5etbn80174klvepb0d3ji2j391/27191497911.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/436e2bb816a6f505385926fb75720d8a/rolar.pdfIn PDF document text
- http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3b99b320---75613934786.pdfIn PDF document text
- http://marsalanoleggio.it/userfiles/files/bolimenivosasanigagujur.pdfIn PDF document text
- http://alliusie.com/userfiles/file/fegibepozipudetakazo.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///53028108470.pdfIn PDF document text
- https://digireg.org/upload/64095265599.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5840ab5f52---96449451284.pdfIn PDF document text
- http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/gominososajuvosefewowow.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jc9ag64citqmb2dhf6c7hi5c7d/vewugukurevupig.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/51b33674d81c1221a65d6375a183d6a3/xomoligabafoloropegoxowup.pdfIn PDF document text
- http://e-photo.lv/ckfinder/userfiles/files/toxumofajejexapamitimefut.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084abb014b55---38106055657.pdfIn PDF document text
- http://shuimotongyuan.com/userfiles/file/zevifogalegumadomoluk.pdfIn PDF document text
- http://sedaciesupravy.sk/media/file/21049462942.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4b9si38l6pk4325mfq4oouf86/86182627242.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=que+beneficios+tiene+la+bebida+de+cebadaPDF 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_off00011f51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F51	10668 bytes
SHA-256: `062389e365b9645d683608cb7f17ce419600983fc1621b29547c2a533df41a09`
`font_01_sfnt_off000137fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137FE	18784 bytes
SHA-256: `d38a53ee76b4b6cd69d19d6c36c82b828e69f94d9645e56dc8edd813c60f9615`
`font_02_sfnt_off00016790.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16790	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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