Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7badc04a528649…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 07:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 168d3554de7ae7d0e018c66b2ebf8573 SHA-1: c3fa87d422e88fc3e27ada20f4bea9a7aac55694 SHA-256: 1b7badc04a528649f68700e65b7dc688afe03052a942ad516b358a5fb17e7666
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 a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to compromised websites or disposable hosting, suggesting it's designed to lead users to malicious content. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://shshalloffame.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/xamemovumub.pdf In PDF document text
    • http://thesprotia.gr/uploads/file/dexusisigojubupaziwo.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/bupimavozolewitasar.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/19s65fjr7an8s9vsmbp7p2g792/pigudafetasogemuduwe.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/mibemejuvatugojiruwig.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/15137883523.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dc5c5453b---32413108335.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff95b4ce94---lozememoribifobevapo.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/jemafo.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/48926633324.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/25509439661.pdfIn PDF document text
    • http://www.centralperdana.com/file/rulexez.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/18913012919.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/494fd3e0531cd445328e5d4c135ea6c0/kawatuje.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/fe19lt2l0kehh4gs7lj6d30o0d/getuk.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/suvudejexotexegexuxeruboz.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/19198983772.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/nevaxojizatanow.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b89ba44326f---didapadibobovatigoji.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/aa6iavtuo3038l27v0phn24psu/66072018179.pdfIn PDF document text
    • http://passionsavannah.com/clients/0/0a/0a61c075fa1d7d91f8ce2ef588f7e9ce/File/56977724519.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/d78e752d40cf4002a26c5b55d324b8c4/zirapamejunofuzuna.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/fidujof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=sabbath+school+lesson+download+pdfPDF 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_off0000d689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD689 10824 bytes
SHA-256: 5195b696be2f96e81ee68152bfc66d64ef7104e26ecf2c37b89f4795ad7db8e8
font_01_sfnt_off0000ef4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 16828 bytes
SHA-256: 21685fe283fe935ba02a7e3de67988d123f461b15cd024e75ae800e954e451c7
font_02_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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