PDF malware analysis — malicious · 4866e0b929927ec9

MALICIOUS

PDF

83.9 KB Created: 2021-09-01 02:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: eb14079bc4fd5028deaf3cff0a686da3 SHA-1: 7d01962641f2179d11a191aa5a997f87e33cdbc7 SHA-256: 4866e0b929927ec91d9d7531ff96ba92b1c30a9441cc40cbb34a9337ebfbf722

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072867a3156f---60894381461.pdf In PDF document text
- https://icon-studios.com/userfiles/file/fozosijoxatalusemaratad.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609cefb991a43---74539573646.pdfIn PDF document text
- https://tisuputih.com/contents//files/5239091266.pdfIn PDF document text
- http://ithaca1960.com/clients/8/87/874e400c25abfb160fd1c0cf9913fcd0/File/disajerolasavesalabaf.pdfIn PDF document text
- http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/72513379716.pdfIn PDF document text
- http://umhouses.com/uploads/files/pekogepewajixelapituke.pdfIn PDF document text
- http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160708ef153b8a---52779361090.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/967859149aad8432cab88754812eb266/12751991295.pdfIn PDF document text
- http://tutek.eu/userfiles/file/perepirazazexeverox.pdfIn PDF document text
- http://aardbeienfeesten.nl/uploadimages/files/73188945514.pdfIn PDF document text
- http://guides2alpes.fr/uploads/file/gixaxarewavevel.pdfIn PDF document text
- http://mtcnx.com/upload/fckimagesfile/visezowugalulepugaj.pdfIn PDF document text
- http://studio-castiglioni.com/userfiles/files/lisomowavi.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bf68d706b---7634101720.pdfIn PDF document text
- https://www.medicalbi.com/ckfinder/userfiles/files/31618573604.pdfIn PDF document text
- https://mamap.in/ci/userfiles/files/27094393921.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc8475ed63---47827573565.pdfIn PDF document text
- https://toolsatool.com/userfiles/files/13668055839.pdfIn PDF document text
- https://noddy.nu/images/file/fifuseru.pdfIn PDF document text
- https://hyosungulf.com/uploads/file/surugulo.pdfIn PDF document text
- https://catequesisnavarra.org/guiarte_userfiles/files/45086262406.pdfIn PDF document text
- http://douzonebnf.com/upload/file///totur.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d6b36b39---xalabobojodokunozetubop.pdfIn PDF document text
- http://ahkjt.com/upfile/file/70985915244.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=tie+your+mother+down+tabPDF 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_off0000e410.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE410	10700 bytes
SHA-256: `dc4c4aba201bda70bb4a4a918b8220f5b1d6cd0b5e8358396685f623708bd3b6`
`font_01_sfnt_off0000fc81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC81	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011493.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11493	17420 bytes
SHA-256: `1c69567548cffbb42c76f5a05a6f2059777282fc4ad11eebdae4b86513b8d8f5`

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