Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce12d5ffb0dea53…

MALICIOUS

PDF

84.8 KB Created: 2021-09-17 13:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e570a0b8fa449ee21b8e3b49645258a9 SHA-1: 9a3e7082ea755732644f38aea47e483569bcc1f3 SHA-256: bce12d5ffb0dea536e6d7178d8b1968341bade4d7a1a6551dfe4a7f66db157e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=firestick+direct+wifi+password PDF link annotation
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/fumaxosasikikuxivel.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/biwanojenemojamelopote.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/nakibafetazewapofete.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/92613672263.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ea8f39723---20442705905.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/wemumumo.pdfIn PDF document text
    • http://machulski.com/public/file/8889292749.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/jawomekopetid.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/lunopareladadevetuwiper.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/zuxotolasan.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/budodakugufivuzufizod.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/51367809811.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/tiwugafa.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2aa632b1ade6bd011c30638bb3940f93/1756258171.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/16972293600.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ojo1sia8tslab1g3j260flio83/kujitijifotugojax.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/mesuzol.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/mimebelibikokiputiwen.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/17291620137.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/refaxuxoxu.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/jefasafi.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/gelowasezesux.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/10662419847.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210906223550_265335384.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 17784 bytes
SHA-256: 4c329f2f6117de4954cbcefbc4324758ca82c1ab475004a1907526ce17f174d5
font_01_sfnt_off000114ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 10620 bytes
SHA-256: c2f4f884ef05e8838b9567537ad3dc1a1e138210ffe5d93923c1198bab88541b
font_02_sfnt_off00012d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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