Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd824c9ef067ba93…

MALICIOUS

PDF

84.5 KB Created: 2021-09-19 20:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6327fa47ed970c4ec0b01c47fa0b84ad SHA-1: 4f2dbaf25597cdeed71838bf7fd96d95f6dce028 SHA-256: dd824c9ef067ba93fce47c4048b06661ca91359bdd4da00730e056ccdca25172
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites, masquerading as a download for a 'Fortnite save the world code generator'. The presence of multiple external URIs and a link farm structure suggests an attempt to distribute further malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://pindimana.in/uploads/file/mepinagotoxu.pdf In PDF document text
    • http://aeon-dev.com/uploads/files/202109031219541503.pdfIn PDF document text
    • https://cian.hr/userfiles/file/rofuledixorokirasor.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/gudiwolif.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/n5blhe5hmafalsiim6r1kf47j1/naduvojapajipofobugolobi.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210905032948_01w44k.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/11896529424.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/zevuwagajurexipegegokis.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b31ad0731---sakugavi.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/42932716880.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/21064156135.pdfIn PDF document text
    • https://rotitelor.com/contents/files/xerivomediniduj.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0ca5dc75a---3284746582.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/78570524131.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/43664403965.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/gufemafibiwakaketejigudal.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/8910685551.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/8494826440.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/51010156903.pdfIn PDF document text
    • http://showdoimovel.com/files/files/pilovolo.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/75327925105.pdfIn PDF document text
    • https://alariel.be/userfiles/file/siwet.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/52236725550.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3d0d750f0---dekusuluturosubolir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fortnite+save+the+world+code+generatorPDF 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_off0000e4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C9 10780 bytes
SHA-256: 34d7252cc7df35bffa2a68be5744d0d431a2ea91a0328a0a82dac98263016848
font_01_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 18248 bytes
SHA-256: c88a245d3b31c29acf9801a6bcf7840694c517769f8cbf2973284df92d07e7a4
font_02_sfnt_off00012c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1