Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4f3c8b96175fb1…

MALICIOUS

PDF

80.9 KB Created: 2021-09-27 10:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f2bfff8d1480db9394b6745558f8b3fa SHA-1: dac4c50679e349cc2d826dfe8b98759850769b7b SHA-256: fc4f3c8b96175fb180699aa93af1f7499d1c47647d4e546a798359725bedefa2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains or are part of link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=%C3%BAprava+fotek+android PDF link annotation
    • http://twfindia.in/userfiles/files/xiberedawaneledi.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/nevilovitududupiwo.pdfIn PDF document text
    • http://atomleasing.ru/media/File/vikaboganiba.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405d0a8dc08---74739889144.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/tuwelunumuvugexopufedat.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/pinewurumewimowopasuv.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/bizomumawivawerofiji.pdfIn PDF document text
    • http://med-os.com/user_upload/file/nupozuza.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/22654228004.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/38873040034.pdfIn PDF document text
    • http://pronobile.com/catalog/file/78855831893.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/99182109624.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/6991178855.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/rilesumovefabuwadetadif.pdfIn PDF document text
    • http://haphadoor.com/upload/files/petitutavexidusokikoru.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/jaxate.pdfIn PDF document text
    • https://kimansion.com/uploads/file/ropagalebu.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/30630393370.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/50026625790.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/45884921583.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/tujibuvajimeselokevuvudas.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109220355126728.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210907062706.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_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 10460 bytes
SHA-256: 76c294d788fa3e7f19430c9b1a6ab8e074f5723d7a70a0f888ff0753a6d6ebb6
font_01_sfnt_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DB 18116 bytes
SHA-256: 9110084e3688d9bab61750d674c6e0fdf001bdc7accf11852e422b799381a9ee

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