Malicious PDF — malware analysis report

Static analysis result for SHA-256 53423d9449e482c3…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 10:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f74b612ae4a0f2e07c0bd758b953d1c0 SHA-1: 4e7e5f840dc873fbc044bc3839a9fabb270ea67f SHA-256: 53423d9449e482c3c3c864ca893b58cdd5dfd267c2813cc255aa1e51a4765184
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised WordPress upload storage and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105b353a0155---zipipakinisebik.pdf In PDF document text
    • http://rheinmotel.com/userfiles/file/12716136173.pdfIn PDF document text
    • https://allianztc.ro/files/file/24505972397.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/23c9eb03fe8b236d89ab85364d3922ed/83383119956.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0016da0ca---wetar.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/xazudikelo.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/38934058436.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/69495649498.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/36033429825.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/movagokika.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/uvolaoc1djl60pjdjqdouvff8e/68592692678.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/xuwapizipeweburosebufuker.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/40029274628.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202108/file/gokupivafunitivatiwimi.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/14177008663.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fee4e5210---94688949015.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba23ac2e285---dosuzo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846a82bae36---pagajasovurawumozuj.pdfIn PDF document text
    • https://orangerun.re/photo/files/gunebujiz.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6935033f5b8c3972876c156f0d0c26d6/74982170834.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/firimupupizuxone.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/kevimovonelixewamejumu.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/mowasukikumupuramafudebu.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/ca785784a78eb2105258c92e20711e42/52989954674.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/9662220416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=punctuation+worksheets+grade+3PDF 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_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 18032 bytes
SHA-256: c27d9ec4451cb0ce88a84ee0c25c75a11d9b3cef9a81678ead9e668adf6109b2
font_02_sfnt_off00011ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF3 11052 bytes
SHA-256: ca567506c77135255a27caf444873063a72a60770e861a1f932c929df0235fd4

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