Malicious PDF — malware analysis report

Static analysis result for SHA-256 f223778642360bde…

MALICIOUS

PDF

80.2 KB Created: 2021-09-18 16:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 84a26983c57da5bf0d59de4b36b05774 SHA-1: 60866c659d7174497e51ca5a4b5a3c4864caa3d6 SHA-256: f223778642360bdeeb4a8ea83215b46d912bebe68a7dcca79197aa41af23b48b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://klick-tipp.info/ckfinder/userfiles/publics/files/lizerufelivusafaveluxo.pdf In PDF document text
    • http://talani.nl/userfiles/image/file/39207156271.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133350a520c2---36767737363.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/94371845332.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/67827252589.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/57415879348.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614203a3f1b16---puxedizitisezi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613510da09d04---57313902169.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/besimorameb.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/39010483244.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/fejilajigepibugog.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/gifigeburenega.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/7427803035.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/70125027582.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/juxuma.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/mewumutepos.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614371edc2fff---xefiximudaperupifapidawa.pdfIn PDF document text
    • http://contelex.it/userfiles/files/razufi.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161395a0477a0e---gitunemovag.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/gunuvisuk.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/6194575564.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/wexokegibuwomulalu.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/80795853707.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/72902336982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hp+snapdragon+845+murahPDF 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_off0000d4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E6 10980 bytes
SHA-256: 63cc6e3afc74822d5de5e2e5c8f6ba03b6cf52081e030d48a34b5e6a7a22f6a2
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 17448 bytes
SHA-256: 05810f7b2292be45aabbefd6b9986cbb08e4926e623c612777459426d31503b0
font_02_sfnt_off00011b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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