Malicious PDF — malware analysis report

Static analysis result for SHA-256 649603d5e35083a8…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 05:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9ea4321138ec818d21aa4d4a6b8fe5ac SHA-1: 0537c8e0ce2e8d6396829a0aa0757a8916b77686 SHA-256: 649603d5e35083a858693ab2fbbdf0b3d82d4fbce3d71207694299e477838c40
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file likely serves as a lure to direct users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://mecaniquekd.ca/upload/file/xefetejokevifinikigaginaf.pdf In PDF document text
    • https://oddluzanie.net/userfiles/file/nuburudovojosilunegizo.pdfIn PDF document text
    • http://teifsepahan.com/files/file/6465807742.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104051dd680f---wibiredilene.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7bb00bd6b---boxopoxiroxoralakarapok.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/bgknievj9gpp79rtb11998bnqp/61275839386.pdfIn PDF document text
    • https://rcot.org/userfiles/file/21481364581.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/bt7j88t9ha3mh3kugbjv8u8ism/67561755220.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a98a3beec---nekuku.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/83349628898.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160946099a578a---40424206394.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210902_C108C0F497ACC2E7.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/panujifunedolug.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5515e03822---94879218694.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e101eca39bd54fb9b62b52b95fdcbddd/xurasofamuxapivowuzuvibe.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160793378cb1c1---xudiwul.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16092a1ca365b3---sagidudob.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/74472173261.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/losudutakibodatuxu.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/645be30a2c853b50f7774047fe09fc0c/viruwuliwotimajanam.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dudoredona.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/umcj5f01a8n705454o2ghbvb71/49434049665.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/sukusokuzadosewuzegajo.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/57542862570.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edb45548fd---45576304613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=working+meaning+in+tamilPDF 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_off0000e104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 18472 bytes
SHA-256: f33385ac0d5b63d564d7521789809fc0fa44fcb580762a38c0219f7e99d281bc
font_01_sfnt_off00011036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11036 10368 bytes
SHA-256: 7e549d9daa717777d58aad9ae136ae366d17eda3268b7c0162696de018c5424a
font_02_sfnt_off000127a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1