Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffebe7855007b307…

MALICIOUS

PDF

80.8 KB Created: 2021-09-13 06:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4db9299a7dfccc2252f312dffdf78465 SHA-1: 158c167e7855cfa2b326a3fbf8cd6912b03ddaf2 SHA-256: ffebe7855007b3071694fcf089f3e10d195165510c7ce4731012cf6eeecad4f2
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing a browser extension or update. While no scripts were directly extracted, the presence of numerous links to potentially compromised or disposable hosting sites suggests a phishing or malware distribution attempt. The document's structure and embedded links align with social engineering tactics to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/mipolepimejugemeg.pdf In PDF document text
    • http://alanaf.ru/userfiles/files/timekimuzidojegumopolipor.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/fududivu.pdfIn PDF document text
    • https://diphong.com/uploads/domarusakinipidawakereni.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/kowise.pdfIn PDF document text
    • http://capri.lt/userfiles/files/kuxogexufekirevefikaw.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/62920990265.pdfIn PDF document text
    • http://orlickachata.cz/files/files/19296959881.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/89602116080.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/fesisugijukosezepoz.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/dunelazite.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109080803375979.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161392d5e95d7d---pabupiza.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/73110831067.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/xiropuvezajusotupuw.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/93169326322.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ssrv4l032gngukmrlh5t1sq2l6/waluja.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/kezugaridunololimosi.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/jukir.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3bea41c1b---gimevarabejisemupuzo.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/maritujiridope.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/molonukaxub.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/bigegovuribabeges.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ppsspp+xbox+onePDF 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_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 9992 bytes
SHA-256: c2e12b29e7edcad397030ef48410db7e76f404d5f99b48c88c2047c812c009bf
font_01_sfnt_off0000ed09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 18604 bytes
SHA-256: 9ad0a34245d1229a618d92c5dc61494903a4b6e7aba1adb8cc62e14c9ea3f4cd
font_02_sfnt_off00011d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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