Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2a17dbbc25a6bd…

MALICIOUS

PDF

81.3 KB Created: 2021-09-01 01:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c93bc53ab98e0e414a9a448a81ae09f SHA-1: 4ca59a3511609a007a21ad9a4f4d55c679a6e425 SHA-256: 9c2a17dbbc25a6bd166547ba1ef91264ec0b82af2424e3dd84e9644c5e6819af
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=instagram+see+who+viewed+your+profile PDF link annotation
    • https://shriramsteels.in/public/ckfinder/userfiles/files/lewikojun.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/bivirenuzafuzivu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e215cd58868---57200608647.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd280f3d23---lorifonomaki.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/wefuramuno.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/29870135585.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/29192012076.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/kedezezarevewujexit.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/vajipepovamawawegivevi.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/2774737793.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/dukififuvedagedojigod.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/47e9d93b07cf4dfa71e8b15abb1cb1f4/93480356557.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/najeretidot.pdfIn PDF document text
    • http://wonderful-foods.net/userfiles/file/movulokosakazi.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/23348851213.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/10748a822ee4b552c544da7e3637d61f/vemosapef.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f0a33840---zosivulejenikiwida.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160f86c9892f92---jevagus.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ed67b60db---lalezozapejowubekal.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/baromujuzadege.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/c9d84f10045a220d2f69ee6743e921ed/tazibawirafolileguwovije.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202108/1628772789.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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 17592 bytes
SHA-256: cea40bf40d1dd0aecacd214836cf4dd81b2242ab8808721c389119a9c3d8ebad
font_02_sfnt_off00011cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEF 11264 bytes
SHA-256: 9f1343a7a23dd5595fab5565d7b88f9c990ad892aac0ff66fecd88fd890e3b72

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