Malicious PDF — malware analysis report

Static analysis result for SHA-256 74948317884c0c78…

MALICIOUS

PDF

87.6 KB Created: 2021-09-03 21:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ab8b213cfc2d7445d75a30b25afc0aae SHA-1: 506444498d5691608328f9356260843c396e5521 SHA-256: 74948317884c0c78af5d230022e776c580bf55dabc77d867b28f2adcb484f4aa
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly indicates a business email compromise tactic, likely aiming to trick users into altering payment details. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 http://velo.hu/UserFiles//file/49147482857.pdf In PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b8dd7ce6c830099b0a616e3ff5d12cd1/87153654466.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6d946254e---44989942552.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/koditedupexetolep.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/80122135128.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/48491502465.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bd36e19c095---davesenatabesazud.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/ad763becfb49b1501be1e73f9f9fb55e/xigimurawumawifuwijerox.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a8e332e67ba---93069400210.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/43042804027.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/28024577479.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/xejozoxe.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607073ba3ecc3---24515504328.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160896de60ce79---3268820935.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a397e4382---fanikakuwafobis.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/kodav.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/winejutudelojegapofozo.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/dutiderupolikoro.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/76607968596.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/68024829225.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/4935033186.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20574833050.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210518195951.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/pexirapudusudupava.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ee9551188---79596415793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=split+pdf+documents+free+onlinePDF link annotation
    • 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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 10792 bytes
SHA-256: 96ec7dce506536c2a41793e6799b6ead9d2c21703b67a95bdb0f5369a169f8f7
font_01_sfnt_off000106e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E1 18640 bytes
SHA-256: 50355874f98e62bbff001fedf6dc8f84c0778701e3841cc8fa283673c3e0e58d
font_02_sfnt_off00013806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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