Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68992afa3b46722…

MALICIOUS

PDF

83.9 KB Created: 2021-10-05 07:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bcb350208d5116d34fc5254dad31ed8d SHA-1: 6b26e790d6b2795588d97ddc022c1b0bd45edd1c SHA-256: f68992afa3b46722905810020f097135d5fab3341b59aa8961b8bedddc297a7d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, suggesting a phishing or malware distribution lure. The presence of numerous unknown URLs indicates a broad attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://paneldeconsos.com/userfiles/file/92931158214.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161328207c7344---zapunovaxatoniritisuxe.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/xegaxojojivinilan.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/vakenanuxoxege.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/522521f4bd0eaffaaa91d2e33d34be4f/31293908991.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/biwaxiwujebi.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/45466364535.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/a54d5d1d1399ff95f128789ba0448303/35356313548.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/83914848226.pdfIn PDF document text
    • https://pellevah.com/upload/files/11819253803.pdfIn PDF document text
    • http://qdjshg.com/files/file/93651458693.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/86980625731.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfcc14161b---mododatidogibabupe.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/2780495e7ef988a567d739a63d568c98/gevomunewavuwu.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/xekuxokekuseriwakutupumi.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/dewuwozobirito.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147aed71cacd---neminibadapebodezejufo.pdfIn PDF document text
    • https://ms01bet.net/contents/files/74269462194.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb585bbdb---81840529665.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/jizawet.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///nikuxanop.pdfIn PDF document text
    • http://svx.su/ffile/file/77280384725.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/33915835439.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/44885177465.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/gozemuzesagegukedexovif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=neil+armstrong+2011PDF 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_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 19536 bytes
SHA-256: b6344b2df82d9721c7e467386de4af28fc48e86e4d05ed0059482e3e6be8dc78
font_02_sfnt_off0001293b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293B 10720 bytes
SHA-256: 7dc48d493d172a9c99f0666542cd858018cb816d4767fd45223e9b7ff8c62ab0

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