Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc3412dc7b8a36e…

MALICIOUS

PDF

70.5 KB Created: 2021-09-16 18:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 91a7fff5f5c718c7cb48be65c0ecaa86 SHA-1: 3b5cd7ae5dd678cb43d08eed50920013b8bfbe8a SHA-256: 9fc3412dc7b8a36e9aeaac4cc5c923ff4b5acdfd64f0a399085b5b367f05d76b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://archism.ru/uplcv?utm_term=ninja+miner+unblocked PDF link annotation
    • http://ristoranteibucanieri.it/userfiles/files/64850140170.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/73354564516.pdfIn PDF document text
    • http://carraracucinecomponibilitrapani.it/userfiles/files/33416969702.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311408c5f2a---medof.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b42f2ed7fc5a963caaa74ca0f4a41794/pexekapinaxudijelodikufem.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/pevatemifagapoluk.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b668616e347631859a7399dba6910a8c/54193075602.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/23176880038.pdfIn PDF document text
    • http://iucecb.com/files/file/pofug.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210909231815.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210914012905.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/18031887105.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/noliz.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/51321107813.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/44699027488.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/muvazutefafukogagome.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/66693148086.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161409135b4b00---7875687760.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/80212361018.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/52992578724.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/makagugizonibotetet.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/96091815606.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/53883987304.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135683e30e38---89489472034.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/47819495895.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_off0000b6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 10704 bytes
SHA-256: 8a0d755cdba8c33767efb693af529158d23e69a425e74a2f5431b7e20a1b0d77
font_02_sfnt_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 14892 bytes
SHA-256: a1e843d3ce42024fbd4a6d52e55b0f8418a6f3400e766433700975658352ef9c

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