PDF malware analysis — malicious · 83be14c3f88cf1aa

MALICIOUS

PDF

68.5 KB Created: 2021-09-26 23:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 025c3cc2d3dfaa4f268198341621397a SHA-1: ef03399660a14abf5e9134b8ee7790329c254b86 SHA-256: 83be14c3f88cf1aa474b709b638c1a18a5f438cde1ca8a9625ef60ac00b37330

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised websites and disposable hosting suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classifier output indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/bb4bb0e89341bcafa4c9c8fe22e93ca6/nezuxasanazodujedujofis.pdf In PDF document text
- http://sakesushilakehavasu.com/uploads/files/luzoputagewexi.pdfIn PDF document text
- http://oiacreation.be/userfiles/file/9296780467.pdfIn PDF document text
- http://longarmacademy.net/fckeditor/userfiles/file/sorutusova.pdfIn PDF document text
- http://kyochonbuenapark.iorderfoods.com/uploads/files/vabewovuvagef.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7a603ed6fd80545df6358aff484b27cd/tunuliwigodatuba.pdfIn PDF document text
- http://abbuffalowings.com/uploads/files/4504708611.pdfIn PDF document text
- https://suksesunited.com/contents/files/47852986888.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7c108bcdffbebcce017707dd9f4acf72/jenuruxugalolokezegupito.pdfIn PDF document text
- http://tvkinter.com/file_media/file_image/file/tivininepo.pdfIn PDF document text
- https://mclandpin.com/calisma2/files/uploads/bavabikaz.pdfIn PDF document text
- http://nationshield.ae/userfiles/files/32582205413.pdfIn PDF document text
- https://manualismedicina.hu/fileok/file/64283019104.pdfIn PDF document text
- http://ceramicaartisticamarsalese.it/userfiles/files/4414793661.pdfIn PDF document text
- http://dgelc.com/userfiles/file/20210912125714.pdfIn PDF document text
- https://textosolutionslinguistiques.com/upload/editor/file/fuvovofaxob.pdfIn PDF document text
- http://lesbambousbleus.fr/ckeditor/upload/files/gawuwebovupaforeregulu.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f43fd5b370---35514430215.pdfIn PDF document text
- https://digitaldaya.com/imagenes/file/sarefukurobigalupoluzipin.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16144d5de6cccc---13021069054.pdfIn PDF document text
- http://texinpack.com/uploadfile/file///2021091010161750.pdfIn PDF document text
- https://vleek.com/uploads/files/fozidujavusovug.pdfIn PDF document text
- http://permanentnimakeup-brno.cz/userfiles/files/15051080352.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/7412da8d976fc9d002759136ae2eeb22/gimupivulir.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=strength+of+magnetic+field+equationPDF 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_off0000b00c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB00C	14384 bytes
SHA-256: `8a53cf6bd93a0c529bd7aeb28edb464a5ab36c2ea1be89021500f5a98fe9c2c1`
`font_01_sfnt_off0000d360.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD360	11076 bytes
SHA-256: `d0937927c217f161b41401d3c187ee1ab63b497bba03a21d19d56503245ff9d2`
`font_02_sfnt_off0000ec7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC7C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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