Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f83bbb4860c6f9a…

MALICIOUS

PDF

62.5 KB Created: 2021-09-02 10:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a4dd8f1936b38bc51b18a6358a5c64c SHA-1: e73d1cf238bb5c6e330486ccfc7d5da075bab3dc SHA-256: 2f83bbb4860c6f9ac1d55f996c7018cdbe63ac09b930b64687c5484c18b5256a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by an ML classifier as malicious and contains numerous links pointing to compromised CMS upload storage. These links are likely intended to redirect users to malicious websites or download further malware. The document's structure suggests it functions as a link farm, a common tactic for SEO manipulation or distributing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7493

Heuristics 4

  • 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
  • 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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/msbg709p102gbafsvjq5on5390/97581344006.pdf In PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/vubenusarebex.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5119ec1b89---40614237926.pdfIn PDF document text
    • https://lemanssrl.it/file/15262716059.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/rutubekukego.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160eda41ea7c4c---dezomupezexip.pdfIn PDF document text
    • http://teplospectr.ru/images/files/bopagaxotagovuba.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202108310733161278.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4a7e80241---92733163703.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/gddb4nh7cr7jqh3sf81l4pocc2/potobinitokipadajuzeju.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/94132983864.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/63234823921.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/46539448696.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/fanawixof.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/28444091751.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/1191dca06db78b9b04dd3dde52257aa7/femarowovabenarip.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/529d32a6304b30f1f27e2b2414e51291/dapelawitifi.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161268e0829e5c---tixipareges.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/53174101397.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16108496e02f05---74957046345.pdfIn PDF document text
    • https://steammining.com/userfiles/file/58412773925.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/200446491588.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/xinavimoxugamidafol.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/vejikifobibinovire.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac3faa3d9---lolitukuturu.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/78714903447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+long+can+a+bat+live+without+waterPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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