Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d6f97f8211248f…

MALICIOUS

PDF

72.2 KB Created: 2021-09-06 00:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 581080b37520b5bdd34e543a875ee9d1 SHA-1: 007ef2a24ebd4cdbab238c9ab4176a110ed9dbf8 SHA-256: 47d6f97f8211248f085849b977e7c9bdaa8473ef2d24b25ed01dc99dea5c025f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of external URIs and link farms indicates an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=information+technology+class+9+cbse+pdf PDF link annotation
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/norix.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2a238d2ef---milukezunusuvipixufevorob.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/6810317163.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16072f2676583f---saxofiba.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-08-28/210828104303169065luf4hngy3woc.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/a63abfdc5230f0878e6adefd7d8d9f09/12801681458.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/31130873795.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1611ef60b7498e---pifekebotamesal.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b50cebe950e---58873111298.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/59764375872.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/9514371321.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e86bab18ad7---jinasavatepigibesulorisa.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/gelugimujeteroluxek.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/26897108628.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083d3002cac5---kaxer.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/fezukosarotisopo.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/gejofixawadola.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/63757899772.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0da49339fa---timozadaxirevom.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16101164930f89---futifajazogasusikixema.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610c9c2f296a6---sunoja.pdfIn PDF document text
    • http://melinterior.ru/userfiles/files/kedodofagumosi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09c0756055---lexamesab.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/14067921255.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_off0000b81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81D 11440 bytes
SHA-256: 028611a66ea7aa534f42f11789a5bdb560eb727f6a73c2f482f727c94b327dfe
font_01_sfnt_off0000d285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 16020 bytes
SHA-256: 3ecf3f701284f303208de917d7f7063cbc039892b591768dd406af9afa98df9b
font_02_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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