Malicious PDF — malware analysis report

Static analysis result for SHA-256 0742230515b77fb6…

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 09:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e26433bc11902fd4457e917ace9b7d44 SHA-1: e838209a5e79c39c72291f07173411bee7c16ff6 SHA-256: 0742230515b77fb6eff67cb309791fa8e6e77c8844cf7af27c31d96b9b31823f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by identifying a pattern of linking to many disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=plex+client+for+android PDF link annotation
    • http://sushikyototogo.com/uploads/files/2572369526.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/65477687146.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/3839426401.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/94525839878.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/fizojuxigaridadew.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/lukuzusitadupukov.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/metikoronan.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109150531016366.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/fujemoralavedu.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f313a2b7b5---52055090172.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/26716625976.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/mezijedepagojorakewobaxob.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/nedodazofopovevobawev.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/kafibo.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139f80d07d8a---61485392939.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/90083492260.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/wakinogafuvixaxugi.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/92548911261.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/romajevixugolawubaz.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/89843443520.pdfIn PDF document text
    • http://theponghop.com/upload/files/88049877306.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_off0000d3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 19052 bytes
SHA-256: cbe8a2f2a05a14c9a2532212e25e1287295390b1bdb6a0e0b4a8e2dab39e1d84
font_02_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 10404 bytes
SHA-256: 65802d934da91e236d47474c3ded7c65227781ff675d075a1a8edcae93c91bc3

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