Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b433327c2ec0c2…

MALICIOUS

PDF

98.4 KB Created: 2021-07-29 11:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d3d3100e5166310b959ae9efbc2220be SHA-1: 433b6c77a35c1079cf8a5a89c53567338494155e SHA-256: e3b433327c2ec0c2ae407fda14070d3d1f5a1d97513db86e25996cd263f5e1c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=war+movie+2019+google+drive PDF link annotation
    • https://china-glass-mosaic.com/userfiles/files/20210604_004610.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/mofax.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ee474e269---xalofexegemodigerugi.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/89381100600.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8eaf5d039---luwogitodeboliresosa.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/17625668366.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/xojugofugekudivepejimirab.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/poxisesoxivobutovifuxemal.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/396f4016ff640bad258f14c708bb0efd/23532258226.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/laxokukifojidafukog.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95becf7a0---10775670966.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/27b5c7f95f9b87e2b339539f718c3cd3/loravuvakozarono.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/vilemogeruxu.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/kkn1tit36i7e1jag6d1tpqp822/vamokelujupotapa.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/61077574662.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090404f93fdb---navegemizuvaluvokavib.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/2cea80376844e62e84f9cf04c5a772dd/midinunaxisavepotopuvumab.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b64b78ce5b6---61408737658.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/9871bdba0fd3db93408bc9e37a08f15f/bizufezu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e0a6f73a5cb74a1b923af69480aa1f9c/zisifijaki.pdfIn PDF document text
    • http://ladakhtripmaker.com/userfiles/files/xetemuxonomepizedu.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/71546054531.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c65623bde2---nudevofulapefo.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/96420217280.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_off000119ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CC 17884 bytes
SHA-256: 7429b72223b847c1d9482f0e08a3f072a42bed28d8fddaab6ab10607958339e6
font_02_sfnt_off000160c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C8 10740 bytes
SHA-256: 9272856dd76bf2ec9796ba93c62f0218a6135c6255c6dceee4e392fa2a35da57