Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ef448d2b501712…

MALICIOUS

PDF

75.1 KB Created: 2021-09-04 01:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c53d42d57d7411fed3c0b18e797250b2 SHA-1: f0dd674d4e4195b973cc01c70c43d61e4548aae8 SHA-256: 93ef448d2b5017124a05cbd0879410d479db358add4ea66a3d078d3830e46c95
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised CMS uploads and disposable hosting. These links are designed to trick users into downloading further malicious content, potentially leading to exploitation.

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://novelinternationalschool.com/ckfinder/userfiles/files/47563855545.pdf In PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608edc1fe07b0---43789053873.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/26555388705.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/dfdd531e5a14c6555133b8a9dcd5e5c8/49839515131.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/vupokugidijutosogu.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cf6bb451d---wijoret.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/70494082752.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106f3602aae9---rorele.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/ponik.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854a285f32a---38985886214.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1590b91003aa01de31d041522403807c/3827734137.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/xesivajid.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0ccdbd215---movoxefazeket.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607479c6374d6---65521132121.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/rezuwijap.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/82414230005.pdfIn PDF document text
    • http://ibb-online.ru/f/file/5730679074.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/35683413593.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/37016ee7e8378f67eca2d028ff54b453/saxobonisoxebil.pdfIn PDF document text
    • https://maisonforville.be/documents/file/mobiramizomowugokibidided.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/13177833761.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/gagaxonuvivoze.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/jeripaperigo.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/rapowekufoziwojeletubaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=venture+deals+3rd+edition+pdf+download+freePDF 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_off0000bf4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4D 10820 bytes
SHA-256: 48c5458b9add2e939fac07d668bbfcfed666d01e818f504f3648dcbc85c4c860
font_01_sfnt_off0000d87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 17544 bytes
SHA-256: 03ad84f170d36a8a2910d68b7f52b29c202ceaa0e996c6eed3be7512c0077661

Open this report in the interactive analyzer, or submit your own file for analysis.