Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e92aba04192cd3d…

MALICIOUS

PDF

71.2 KB Created: 2021-10-07 09:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cdd52b5f0f362644b15702b874e6cb46 SHA-1: 4288811e6842da6ea49eb19ba683b86130901412 SHA-256: 4e92aba04192cd3dc4c388fe18916f7653b44ff9445653223700f10058b19357
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic and numerous external URIs strongly suggests the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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=two+examples+of+point+source+pollution PDF link annotation
    • https://childprotectionindia.com/lexcyberia/userfiles/files/zumexa.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/80706574689.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/56479989170.pdfIn PDF document text
    • http://kotolantopeni.cz/file/58398134349.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/jorewuwazoxumidise.pdfIn PDF document text
    • https://sudahhabis.com/contents/files/99645206038.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/ginunotapuwugovubevex.pdfIn PDF document text
    • https://e-midas.ro/files/file/66956928470.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/1797734798.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/2134877011.pdfIn PDF document text
    • http://weldingplaza.com/files/file/33501986130.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/zajiwegaduza.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/22337436374.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/36039593776.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/tetuvoxijeforujutuverero.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/37479098525.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/99187247208.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/gitagomakuju.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16151b19a0ec69---berukigonekeviterupizu.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/kaxozedazamewukijafo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da9fd9a8ab---kolewezu.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_off0000b5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DE 10892 bytes
SHA-256: a43aec1da83f2b0a5db127e0e6a3f66984699d71db5729d180ba3773b393c139
font_01_sfnt_off0000cf28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF28 15852 bytes
SHA-256: 7af527c9f9dfb785804e5104c9b5fd1aa0503a353797d3af3aef6f0ea728c94c
font_02_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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