Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f249e03266904f1…

MALICIOUS

PDF

88.1 KB Created: 2021-07-22 03:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 470adf199ac60aa74c49e63bae5692ef SHA-1: bfa018782c587c773f629715502944b6e6f30036 SHA-256: 5f249e03266904f16700151dc49fdf05eaf41e7622822f9ee6b68e57d612a24c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous websites, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of a 'download' button lure further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • 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://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/17285b71824b2ac5f729121acc399c87/68519920105.pdf In PDF document text
    • https://mimpi1pusat.com/contents//files/92059859951.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/86103803212.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/boveguxejebug.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071dfea69d73---36441314036.pdfIn PDF document text
    • http://moristas.com/userfiles/files/lofukorimow.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/75140080268.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/367276800.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/6alqlanibdmad3ii8852vrqbt6/lixit.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/81485168691.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702d16e0315---4350842361.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608056e8159f6---57646180797.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210626092135690.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608360ac23bc3---loreritezifutoweme.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/27869435794.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/sudelabawawumowatelo.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/tebipu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4749735005---tewobobogexotovi.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c66ba3785b8---vabupo.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/nubofaxe.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/vbb58coc7vm8ur9t55isf1mtm0/14088535211.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/dexodusomogovisitokiduser.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/mujimigipokuzabaviwotupen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=avengers+infinity+war+full+movie+in+tamil+play+onlinePDF 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_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 17660 bytes
SHA-256: 590d25e12bdcac0452e22542d3284f6783d620dc05f533b463f39010fd580b1b
font_01_sfnt_off00011f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F72 11048 bytes
SHA-256: e0d70a2608b28b23c94e1266504bb309723204dc0f8015acabaf5084fe663928
font_02_sfnt_off0001394a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1