Malicious PDF — malware analysis report

Static analysis result for SHA-256 499906f95c6eac88…

MALICIOUS

PDF

97.8 KB Created: 2021-09-16 08:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 427bed5082d5b16ff865281428263175 SHA-1: c9da76eaee7a8f84fdd85358785d162ef92651b2 SHA-256: 499906f95c6eac8857663cde8019bd42f0b619d3115e74db2a8f5bb5ed0a9b50
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests a business email compromise pattern, aiming to trick users into believing they are interacting with legitimate financial instructions. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pistant.ru/uplcv?utm_term=the+law+of+attraction+pdf PDF link annotation
    • http://senvietsystem.com/ckeditor/upload/files/ziniwexijotulidazelusa.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/repanugiriz.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ad54e7edc0e80f00e77fc9f4b509a426/xejerenumugawuweb.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/minodosujorulurovazuma.pdfIn PDF document text
    • http://guitarenko.fr/img/files/kuvegexijebapodi.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/kibowilopagikulida.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/51237951442.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/vuxivodoxasajir.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/nixarizupaputixedoxexu.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109081248315065.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/nodcgk8kvus46ul8aekldkcun4/tuminokelan.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/61373176037.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/74511724456.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378a0580204---95901833797.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/wanolerimipanamuvojoz.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/buxarobifesasetabapiraj.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/bagirevupuwiv.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/wikig.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/98472857097.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408aee0032d---3038099423.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135b9f648b0b---60704404833.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/wudopavezuzajanibaviter.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/purepev.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/pezujaz.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_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 10596 bytes
SHA-256: 94721b114b3c104bfd854a7be3fbcb9ee01fd2e1987790b859c138f0fe83dc8f
font_01_sfnt_off00013124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13124 18416 bytes
SHA-256: bc551800d7e9d94325607adabdbd31676ace1c2cc3fa52fd5b98f63678e88a41
font_02_sfnt_off00016136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16136 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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