Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c442e732d40191c…

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 16:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fbf79e94c078fe54fb36c7a38bac4ad8 SHA-1: b2b55c978c97a91162236df18b6f936f75362316 SHA-256: 3c442e732d40191c0a67b450750594d954ba07f74ad4573f285efaa4cb487f4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to disposable hosting and redirecting to other domains. The PDF contains embedded links, suggesting an attempt to trick users into visiting malicious websites, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=change+email+account+password+on+android PDF link annotation
    • https://sharedsynergy.com/userfiles/file/timudujezeki.pdfIn PDF document text
    • http://apismorava.eu/docs/xubituduvekevedokij.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/43722020728.pdfIn PDF document text
    • http://lg-palette.com/upload/files/67012193748.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/vujuxovikunal.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/73491391399.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/41416473381.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/jonejonagufeduwolekezefi.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/lerepino.pdfIn PDF document text
    • http://katela.net/userData/board/file/xapukowuvovujoredezaka.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/donavebikunexonunijiw.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/suvumufesebuz.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/90194490743.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/zulebofuxatinegonoke.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/38514569683.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/pagopavopojavapiga.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/kapilolepadababa.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161413ed88fee4---44747044290.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/78762352888.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/defijul.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/52818074373.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/kofonomibezugalelujal.pdfIn PDF document text
    • https://rubfila.in/files/file/zobodunadakuligosowifaker.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/pedaderupivatenadekuwam.pdfIn PDF document text
    • 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_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 11180 bytes
SHA-256: 079c8e74101d53fe5f4908834ac8a26fb4e0fb7011571182794ce09032f69fda
font_01_sfnt_off0000eccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCC 17548 bytes
SHA-256: 45c5c2d1071fc61a6c1554ec6c1b099ee58e6a97186c998f57baca114ee7d5f6
font_02_sfnt_off00011a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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