Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc0ad48e12992df…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 00:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f22c9be4341743bff0c3018ee7075f7e SHA-1: 6f3fd3fbf43399727ef95c4558a716989cda434c SHA-256: 0cc0ad48e12992df1cae22989658f3dccd708b73dc441b47885ddfa320f07b15
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan payload. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or download of further malicious payloads.

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=apk+downloader+with+link PDF link annotation
    • http://thevisionkharj.com/userfiles/files/43183892941.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614502d65f807---lizan.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/66049257418.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/mubinutedajebogepol.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5290859af---49484925516.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/18919191772.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///88409150785.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/268326826.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/23021096067.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/rogowepanodemaramobolowan.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/60648399387.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/48026979306.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/98201779953.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/10262144236.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/kevogaguke.pdfIn PDF document text
    • http://ruihuitax.com/files/file/9835131398.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/vosipemesizoxolamegon.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/70672041724.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/rovidemipoge.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135440f87646---87897650422.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/jidigukalozolakiteboxu.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/21546635408.pdfIn PDF document text
    • https://gameclub.by/uploads/files/17209304564.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/47674844840.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/87768801429.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_off0000def4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF4 10480 bytes
SHA-256: 05271c13a9b9241a19c7275c425cc8b49eb72f3b259b67aa389fce10bd3b967d
font_01_sfnt_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 18512 bytes
SHA-256: 4d31891fa639b18a0a43be779dd75926fa5c32343f0d29642885535a6440db64
font_02_sfnt_off00012633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12633 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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