Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb30cee1b1f4f38…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 06:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 59064354556507f5bd16935f2391cfbb SHA-1: 81575e917410219a80b982d2976a6a1bc257433c SHA-256: 7bb30cee1b1f4f38fb1e4cfbb5bff38222f62228079ab7a50f503433346925f3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs, many pointing to disposable domains, which is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to potentially harmful sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • 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://3rproject.eu/ckfinder/userfiles/files/40009728893.pdf In PDF document text
    • http://tbeaindia.com/userfiles/file/8326286215.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/wizipozurivilamudaratep.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e833292c11---pilogo.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/25967240728.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/noxuboxetotafikege.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/werutefadajuwi.pdfIn PDF document text
    • http://parafiasadkowice.pl/pliki/zikuti.pdfIn PDF document text
    • http://arucax.am/user_images/file/zetopujofawuruxa.pdfIn PDF document text
    • https://alkoplast.rs/files/josomipidipazogisuvo.pdfIn PDF document text
    • http://gensugroup.com/upload/files/17112951278.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/83716497884.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/48056106046.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/60800488004.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/fekizegareniwa.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///fawosotidebuzuranosej.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/21920767478.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a5d3a361b---lovakitotokovivukeno.pdfIn PDF document text
    • https://qematalsihha.com/ckfinder/userfiles/files/xifafoli.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/bawiluxibiz.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/86797285800.pdfIn PDF document text
    • http://expresskaliski.info/file/voguririmi.pdfIn PDF document text
    • http://preiss.at/upload_files/files/68383349617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+accounting+books+for+beginners+pdfPDF 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_off0000aef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70C 11132 bytes
SHA-256: 04771086f2cdc94f370a78e636a37a0c38bee7fe4943fd7162a9e4506d6ec4cb
font_02_sfnt_off0000e0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 15460 bytes
SHA-256: 24e1bc9e0ab68e6977bdc8795f0aad80e56c0f72e859f38921172204211c9fab

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