PDF malware analysis — malicious · dbf8d9cc709ccad6

MALICIOUS

PDF

77.6 KB Created: 2021-08-16 06:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 27f1645adf652ce8224338c961ddc876 SHA-1: 40bc6f46aa64996ad28cd0edfcb7a7a570d81d40 SHA-256: dbf8d9cc709ccad6f8f7a8c0fbd5170f09dc5646da5403b7377b0fb739a90c4f

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The ML classifier strongly indicates maliciousness, supported by heuristics identifying the PDF as a link farm pointing to compromised CMS uploads and disposable hosting. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to potentially malicious sites, likely for phishing or malware delivery. The presence of multiple compromised or disposable domains indicates a pattern of evading detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 5

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://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/o7lj9q68nok08dhrjtiqnvats9/xonipanubonadaget.pdf In PDF document text
- http://www.oomedia.com.tw/ckfinder/userfiles/files/dejeka.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e7706b4af---gujuboveketavafoforobopi.pdfIn PDF document text
- http://artpolyclinic.com/file/files/12440884570.pdfIn PDF document text
- https://matratva.in/userfiles/file/vakujobaz.pdfIn PDF document text
- http://ristorantebiscione.com/userfiles/files/79548206377.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/7pj1q0tpsmu1cb7mnlqu3vlr2o/23024895180.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/010002403051.pdfIn PDF document text
- https://karolinanowak.com/userfiles/file/jigidagi.pdfIn PDF document text
- http://eko-inwest.eu/upload/file/80561705602.pdfIn PDF document text
- https://leise.ru/admin/ckfinder/userfiles/files/salafemaxa.pdfIn PDF document text
- https://ajwatravel.com/wheelmarine/userfiles/file/21252539400.pdfIn PDF document text
- http://centralcogtc.com/uploads/file/pakawobelumozokuxusi.pdfIn PDF document text
- https://leganordavigliana.it/uploads/file/nevekosixex.pdfIn PDF document text
- http://dietmoiquangle.com/webroot/img/files/26096477209.pdfIn PDF document text
- http://yournamebadges.com/withyourdog/cms_uploads/file/wotitewiza.pdfIn PDF document text
- http://argol-editions.fr/userfiles/file/78787905123.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b4eff3380486a5a2a17510ebf1a8403e/54358524884.pdfIn PDF document text
- https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/01db6c60845748eea3ef34e0bd89f49e/rogawud.pdfIn PDF document text
- http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/lanirepejigamobawepiro.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac738128c8---fozujomozevelutametoziw.pdfIn PDF document text
- https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecc0eb5a039---tuzarogazilogabovuziza.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16074b5c9a5b48---82079210550.pdfIn PDF document text
- https://anandamsanyal.com/userfiles/file/pofedipeku.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//89308313249.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=administracion+de+peque%C3%B1as+empresas+servulo+anzola+pdf+gratisPDF 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_off0000c6dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6DC	11520 bytes
SHA-256: `797f0fec7dab8646de0857e93d3e19e55588133489a781c226b08b3c24360c6e`
`font_01_sfnt_off0000e173.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE173	17324 bytes
SHA-256: `f0f49b8d0ed6223c1eb97d2a748a7dea7304bade6d2ae3d3b6e7f5d56c70bd72`
`font_02_sfnt_off00010ce6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CE6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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