Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0297da277eeaa9c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-07 18:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 35c7d4fe5a5896f1ceac1a63d33d1481 SHA-1: a099532c63f21329cdbaf1a91877fab63c72dbdb SHA-256: d0297da277eeaa9cbfcb3f3bbeea687021fae3a847c106047bf019707de4238b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple external URIs and link farms points towards an attempt to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://securitydm.eu/slicice/file/dunilugojunuki.pdf In PDF document text
    • http://ssujaxchapter.com/clients/83257/File/vomabegezidoje.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60FDDAA6E48C4.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/75393036586.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c78931a7fef---52537564318.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/limobe.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b047e37877---73143204341.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/mowoxolulakixug.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610378bcdc54d---kokotanoremoku.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/kirisegudemik.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d4869b3cb9b---femisadebereweziturovili.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/goxegonulufisatunapiju.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/vrbkhp52beaol9c7cr670ren18/41889583977.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b1f02bdf---22028906368.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/40264106474.pdfIn PDF document text
    • http://annabarons.com/files/files/votukazunazewelaw.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/vilojekefuragofe.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/864472d346acb35c42f6604739bc4108/76179207505.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33af5cdcc---mukuxabofulirimitizazoba.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/98816722580.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/puwobaropaza.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db96ab900---91204018012.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/dafomupikusanejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=fas+ligando+pdfPDF 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_off0000c724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 10320 bytes
SHA-256: d98665bb95c7b1beb0a470772483d3c53990bf9e3d9eaced976647e7b26ce2f2
font_02_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 17916 bytes
SHA-256: bee212781cad6d1a3380440c015da7b2e93dab2dd1021828d1b170c3d5b3dc6a

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