Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d93e5056bf3d03…

MALICIOUS

PDF

68.7 KB Created: 2021-09-28 19:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc2cd8283c37c1e3cea360f42c1c7dfe SHA-1: 516e8bfb7b3547628d132b1ecc0468ca89be9a52 SHA-256: e0d93e5056bf3d037b92fc1cdc69c2ffd4cfafdfb7c9d3068594f620b026bd54
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs pointing to disposable domains, indicating a link farm designed for malicious redirection. The ML classifier strongly flagged this PDF as malicious. The presence of embedded JavaScript suggests an attempt to execute code, likely to facilitate redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nationshield.ae/userfiles/files/81621052237.pdf In PDF document text
    • http://daisytalavera.com/userfiles/files/mekubuwumebijowuxutofamo.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/72963317463.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/samorefilarufesekekowega.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/85284488172.pdfIn PDF document text
    • https://ivantomanov.com/userfiles/file/baxujipojomukikejiwumaf.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152f6fe59b2d---rewejesibakixodamuderu.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/pomizarebinibone.pdfIn PDF document text
    • https://yasacompany.com/upload/files/wuwivakekoragiluter.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/70547908117.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/84976398056.pdfIn PDF document text
    • https://thehouseproduction.net/file/48440538084.pdfIn PDF document text
    • http://toonesk.com/upload/5918478680.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/mojiwujijumejadepeveniw.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/kalelakofudawetopozozi.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/17046485512.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/60125583010.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161420c1ada10f---vixezorij.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/dobonuvifisekezifino.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/98036027915.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/85737195682.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/81396586456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mx+player+movies+apkPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000afc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC0 14844 bytes
SHA-256: c8768078a3a9227e1713f5ef58c71aad37d1dd77162fb59156efe994cc22974f
font_01_sfnt_off0000d530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD530 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 10580 bytes
SHA-256: 5a4e1c9f6cea03029b0139eae82c556ad36cdd0cd034672570cbefa595a205ca

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