Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3f4239ee1e7c53…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 19:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fd807d039edcde8f2b36d122dfcb15b2 SHA-1: b1c276fb2a12af8b3cd33867aed23b487b40058f SHA-256: eb3f4239ee1e7c5306b2924af83cd2a560c485b9e290a4f28d30eca61cef253f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also includes numerous external URIs, suggesting it attempts to download or redirect to a secondary malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=run+3+unblocked+games+wtf PDF link annotation
    • http://pizzeriagiganti.ro/imagini_ws/jojituduraxegibes.pdfIn PDF document text
    • https://trexanh.net/upload/files/98003990572.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/50058946831.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/70061638593.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/piwaji.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/somozumosuzogunat.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/fidivowomizebakokaf.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/28846156990.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/1369181324.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56044195928.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/zogasuxerupuxanivetigafam.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109070542408407.pdfIn PDF document text
    • http://showdoimovel.com/files/files/gajapitemed.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/61527644945.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/33600163447.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/69755891086.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/65411843773.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/xumid.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131cfb2238c4---duwusajerumajojorixe.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/c092cb5ac18e8f442fd5744ca8bc9329/23436488576.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/sudaxoz.pdfIn PDF document text
    • https://safetyhanoi.com/userfiles/file/71713338155.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210909022440.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/rogerolutafewovuzojonaxij.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_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 18112 bytes
SHA-256: 5aa9fc859e681766957f6eafdfd3ef9ac44e37a29aeef2e5035645108a508fd5
font_01_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 11264 bytes
SHA-256: 270a31077bc705872a11655a31bac6a01ff73a6b263302ced20273e7e3e74022
font_02_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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