Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d96ca52828793e7…

MALICIOUS

PDF

96.5 KB Created: 2021-06-29 11:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 94e2b208b6b59581357a018ccf1a704a SHA-1: 3265d7c5e0420045e452ef4e617359c4dc8460bb SHA-256: 0d96ca52828793e726ad4e9963c46aab0e3bb4b47b342370ecdaf919758c8ae5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing numerous links, many pointing to PDFs hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=mount+everest+camps+map PDF link annotation
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1800a2af8---kenagonopipe.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/vusorifuzexojavevilupu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/roo7jcv7s44q16ipni3bn8i8ar/pisaxuvobep.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/k7jn7luc64n6d3j1jmneav3576/vovapifida.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8bf2eeb89---jivogaponusigozusuzam.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/46329901391.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a1065c53c---48376023540.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/jefesipusow.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/60693194673.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074584b82592---30181116443.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/cd9e3325045bb6f7a8f8760191314a47/89726540374.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/75692645678.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/67785936659.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077836681630---sotejurupinobajarule.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a65221af4d1---rinukeruxegutumanepudo.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607edba1d3101---wuxuniwobitonegalirufugir.pdfIn PDF document text
    • http://ukuleleceilidh.ca/clients/860383/File/36442250106.pdfIn PDF document text
    • https://actorconseil.com/files/file/72794545589.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/p54kk3k4eo4i3398dtfr9o821n/56272131812.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/guzobelizo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e75eba64768a62530c151f8f03537cec/datexezotifugiruj.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/3fe670eb54dc3e43b069333400f1df33/99387934184.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/20805910691.pdfIn PDF document text
    • 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_off0001183f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183F 17000 bytes
SHA-256: a9be4e456a133ec2b86a48e6ea6d8d91a3847d832a9ec2a692670f41b9484ea0
font_01_sfnt_off00014481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14481 10556 bytes
SHA-256: ec3dda5374a8d83e39914f348e75ea532200b1c0e08ff3c8f6b63e7d13a90468
font_02_sfnt_off00015ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1