Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af9d77736b60d68…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 03:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f5926f7e28bfaecb7e704e3875f328b3 SHA-1: 4604c64ea21fd3db5a5ea8df59d8cd83f13ef872 SHA-256: 0af9d77736b60d6888942ca861369f21b477f4fc8ef3d2d848527218a3a07485
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains embedded JavaScript and numerous URLs pointing to compromised websites and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of embedded JavaScript indicates an attempt to execute code, likely to facilitate further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=house+party+apk+mod PDF link annotation
    • http://agilesolutions.in/uploads/motawawofikogov.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/78950610558.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/94375241366.pdfIn PDF document text
    • https://mandaljeebanking.in/ckfinder/userfiles/files/saxaxoxorefarakivuz.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/wuwosonotuviwoxekiv.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210905195752866452bf4rdl.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/xoborobiganewilojijotol.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/nilibikefekoxub.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/rupemogi.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/1873926977.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/wedigoz.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/pezudigodimad.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143975d03dc2---95090534317.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/85648500582.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/pizekiwuzewo.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/4244451aec2a8a7450e6332dc212d678/fefiwavez.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/75679959823.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16131bad6b53c4---jipuzisipo.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/bee58687bd8013bc81a28d1579cdfab8/taten.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/sijanixitofesofujibitu.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/faginubo.pdfIn PDF document text
    • http://www.pilartangguh.com/file/futumojejonuwizir.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614d100287610---nudebedolepererufegujapim.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/86891012541.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_off0000b3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CF 10608 bytes
SHA-256: f846fbf714354188862b738b5d7203b4bc4bde5f048da9804224e317f5045afb
font_01_sfnt_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 14596 bytes
SHA-256: 674ff9d877653549ae6bfb79dbb1f2ee8842261c50e9d465a549ec8122b1c57d
font_02_sfnt_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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