Malicious PDF — malware analysis report

Static analysis result for SHA-256 2994deda391063a8…

MALICIOUS

PDF

79.3 KB Created: 2021-09-19 14:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 89307f8ed06681e656769ac754833944 SHA-1: 7476acddbbad1d3bf1341de173d1946ca46bb271 SHA-256: 2994deda391063a8912bb6c007039dd3cdb3efa04cbc6e75c4b6063bc8cc188d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous external URIs suggest a phishing or spam campaign aiming to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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 https://cructi.ru/uplcv?utm_term=iphone+4s+price+in+bangladesh PDF link annotation
    • http://thenext.pk/userfiles/files/8521171382.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/51489675472.pdfIn PDF document text
    • http://netflor.pl/upload/File/tozelifanututipe.pdfIn PDF document text
    • http://china-shengbang.com/upload_fck/file/2021-9-19/20210919121514112297.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/dodufeziworofo.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/ravamipipuzomavom.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/24668994370.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/34270628509.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///jotakuribi.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/27257180915.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/kilatifuli.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/vixezomenosavus.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/vuzujijebijutikolunuk.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/mamujorowejova.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/dozazibagidom.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d88e0a0b1868792457a7305befa471ad/mawoxixepizok.pdfIn PDF document text
    • http://davcpundri.com/css/file/66941736820.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/8182101657.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/35262686238.pdfIn PDF document text
    • https://megashina24.ru/files/files/20958555168.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/51295519818.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/gerakoduzeve.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/8649554293.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_off0000d26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 10864 bytes
SHA-256: e0ce4a64ad57bd88931977337befe8b7ee62496b93015a58c0c704f845968dc2
font_02_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 17184 bytes
SHA-256: f1683a485e5ca43c6daac8fd907bb4d9830e68f3bb3235025920ec0e9b12ced4

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