Malicious PDF — malware analysis report

Static analysis result for SHA-256 46efdf1b3b0e002f…

MALICIOUS

PDF

90.3 KB Created: 2021-09-01 20:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d10290ad969dfeae4a4bd9a3a5a053f6 SHA-1: 5b99dd7c7396865c19a760defda62ee4ebe48846 SHA-256: 46efdf1b3b0e002fcede799a2294bfda27c59b06e38c38af81d963d410ab6835
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://inwebjor.ru/uplcv?utm_term=two+stick+fighting+style PDF link annotation
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/03b5d394ef0bed4c322c68c152a45d01/tomeba.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/nu9qtvn5ebv2k4lfgnos8jmu26/88615387006.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/busuberazurezavirezutinaz.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/94231091555.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075849197b31---28265231924.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/33265567198.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bd0c81b4460809e8b23067f0f432695d/vesizegozolapogoxesov.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ae24fc7443be0dda64fe0a8a06d14a3a/52552556138.pdfIn PDF document text
    • http://bjjiffy.com/upload/10371659133.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/58bad233aae608ae719fcbbdb2626ef0/2613681135.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/nutevonesu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/mh8s3p8m7tpdl1khmfkd8vs25m/magefewabel.pdfIn PDF document text
    • https://eternalbliss.net/file/zires.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01ea80587e---mosixinom.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/90573212111.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/medegavudisazide.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6581626a86---giwuridapunaxaxibaki.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/39763301370.pdfIn PDF document text
    • http://12shio5.com/contents//files/46702377827.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/ba1fd32b233405a2b97cf69edaa9047c/23658252767.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/96530887408.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4adaf73ecc---40721934693.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/71741989027.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/41418484218.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093afe48ff0c---fizozanizatokakotak.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_off0000f173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF173 21400 bytes
SHA-256: fec94522c7c96efb7183a7454c33126cf51c82f03f5e4061f776886e56dd7a0a
font_01_sfnt_off00012892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12892 10608 bytes
SHA-256: 8bfc58e7cab0b690ac3057c78992670565dd76f70bf1a81149ac61ccf2cef9fa
font_02_sfnt_off000140e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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