Malicious PDF — malware analysis report

Static analysis result for SHA-256 f462decc9f136803…

MALICIOUS

PDF

77.7 KB Created: 2021-09-17 23:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 802fe9a6d521a1564a6fd68822120c5d SHA-1: b4109d1edaeb28b2a601d4035283c3cb5bfd9dd5 SHA-256: f462decc9f136803b9e092c91c303bbb3e6b256061d5cf4c389ab84a24d200a6
204 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript and multiple links to external resources, many of which are hosted on compromised WordPress sites. Heuristics indicate a lure for remote support tools, suggesting an attempt to gain unauthorized access. The embedded JavaScript likely facilitates the download or execution of malicious payloads, contributing to the overall phishing and exploitation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9cb9e452a---40407368397.pdf In PDF document text
    • http://mdsalon.ru/img/lib/file/15461046208.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/guzoru.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad6a815a7cf52ce179378108aa82e34e/kugitojarekirena.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/38587274041.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/85938212507.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c77c40c50---90318709314.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/46025284700.pdfIn PDF document text
    • http://tabletopad.com/images/file/lizedupakiminezadofodu.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/zuzizaxil.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/fabazuzonudolovokoxivil.pdfIn PDF document text
    • https://thietbigas.net/media/files/jekeginavidal.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/33288230460.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/4754436413.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb8d8df4f2---15151932074.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/61472714566.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/duvagarobu.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/votorizi.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/todevafekobajedip.pdfIn PDF document text
    • http://beiks.info/public/file/32725952266.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/74051039381.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130df44cf811---90096354726.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614405baa478f---42277897875.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/sugibepu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+control+another+android+phone+remotelyPDF 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_off0000c9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BA 18292 bytes
SHA-256: 8053bfb5476ce1e8e725ad2aea448e225a242d7ed132383d2bb7a1e682dbfdff
font_01_sfnt_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001107e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 10804 bytes
SHA-256: 463c8b1036120e0388fa7a2fa26e2e454882a30bbff4da1153cccd67fc9910b9

Open this report in the interactive analyzer, or submit your own file for analysis.