Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e20cd78edbd53ce…

MALICIOUS

PDF

99.4 KB Created: 2021-10-05 17:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a84207bb791c8e2ce90415d2fef7a837 SHA-1: 088dfb197ebb6184da187a366331d38cc15ba28f SHA-256: 1e20cd78edbd53ce9a25d017287fb409b0bbba302014cf940bdd1b03ea498bc4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious actions within documents. It also includes numerous external URIs, many of which point to PDF files hosted on potentially disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://le-lemniscus-incandescent.fr/ckeditor/upload/files/jilesujo.pdf In PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1632014727.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/dopewepujixekebamiv.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/wipulerepaxabeferopijadub.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/pilolubemulusumiki.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1bqbmie4hlqsr7tmlai7nrdma4/14730158744.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/xugejeluwuvelezuv.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/xiwopujuzubi.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/64676926805.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/sipom.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba49849c2c6ac2577ab871b347c552a5/saximaxike.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/goxosafavisojelurad.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/gupipo.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/6018437081.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/tokakabafogegojevawepe.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/48623106130.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/95956801625.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/67629626564.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/45884744283.pdfIn PDF document text
    • http://ativn.com/upload/file/79502922344.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/lejunif.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/suzezogafepelanagofenaf.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/pularafawowafigimukabisox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=missing+tooth+clause+dental+codePDF 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_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 10644 bytes
SHA-256: b39e3e60032a742f68d35b4880547f6616416d529e1c50d35a45792aca4ec90b
font_01_sfnt_off00013194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13194 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A6 20792 bytes
SHA-256: c08d7930d2a91d35ef7b775eb4e7a081febb7f81cd0af479786215385e6824d7