Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca68e6b79ee8a34b…

MALICIOUS

PDF

70.2 KB Created: 2021-09-18 13:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c03716649caf815c68ecc035b83b17d4 SHA-1: 9e5aab881e13ab639d250d6c56b7e333356983a0 SHA-256: ca68e6b79ee8a34be2cbea05996f069329368360d302e41c1d53058d74fea31b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious payloads. Several heuristics indicate the PDF is part of a link farm pointing to compromised websites, likely intended to host or redirect to malware. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cabinet-blin.fr/ressource/site-image/files/dejavatoxotozewijajubo.pdf In PDF document text
    • http://mynigaoe.com/upload/file/20210904191257.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/wumejesuputevuluj.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/kibevazisegafimozivik.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/28801193654.pdfIn PDF document text
    • http://erictex.com/ufiles/files/gefujo.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/garodafasadit.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/59687386280.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/41690428298.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/85315681735.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/m7dm878iv4m7ftl9i3umd0o77c/1108912155.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/74813806629.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/toxamasirosili.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/09608a1ed61db447eb6a18f83a16c58e/78012883814.pdfIn PDF document text
    • http://rotang.net/userfiles/file/54055645081.pdfIn PDF document text
    • https://ksuskalology.com/images/file/jozede.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/af5a6caf734195c940f95246a193844a/55269724223.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kapurozomefekojarixatugo.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/51298766888.pdfIn PDF document text
    • http://birdwatching.sk/media/file/xoluroreniwa.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612efea166b52---karujojewipap.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/8c1fd1b49c5634e9cfc0bce93b005600/9139001846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=popcorn+time+download+nowPDF 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_off0000b470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB470 15112 bytes
SHA-256: 1031257260f2765abe109f3222594c365c8624264f3e96139d22f8855624a1e5
font_01_sfnt_off0000dac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 10596 bytes
SHA-256: 7f58ebf1c26c5258883ed77779a348c4196d6f9ad4ed5c49a66cd76411ce5127

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