Malicious PDF — malware analysis report

Static analysis result for SHA-256 29769f16b13588e8…

MALICIOUS

PDF

113.2 KB Created: 2021-09-08 03:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 14ef14b046d0bc1751cf16125356a608 SHA-1: 7b85ff274aeac878c56f868c156c97f33fae0afb SHA-256: 29769f16b13588e8fef0b0a3211699dfec43bdbf667b15f4646b5e53d00bd34a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous unknown URLs points to a likely attempt to redirect users to malicious content, potentially leveraging embedded JavaScript within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5dfb84a51---vufawarolexopofoputako.pdf In PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/muriradeladofusog.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/82470469508.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/sikivuw.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5d511699e---mexexexole.pdfIn PDF document text
    • https://digireg.nu/upload/33007908865.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/xarumag.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1446dc6b6e---jobonofigigawuxa.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5b99a98fc---29104064235.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/92744475533.pdfIn PDF document text
    • https://abeess.com/userfiles/file/kapuzasebudivijavadawu.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/kunagusemibaxinidej.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/wuzowizinetolapanomelor.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/38078873538.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/metewa.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16109ff8866fbb---35577888534.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/zatajepexugagopen.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/68366193524.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608671de9d976---60831919104.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/dagatotufitopetagob.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/57251364445.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/70845928412.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c30e44aa4---47110316535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=midnight+sun+part+3+pdf+downloadPDF 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_off00015885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15885 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17097 17344 bytes
SHA-256: 2fbff35796017c5d11faa968664d3dd62ddb99ddee67d7e56556c758f0c00c2a
font_02_sfnt_off00019da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DA3 10996 bytes
SHA-256: 0bf17448774033021e129c9f555413764396c658fac5542328490c76bb1c87b8

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