Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3033705793444a…

MALICIOUS

PDF

93.8 KB Created: 2021-07-21 15:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 21d41d428d83d2c6e753b975cf2a3487 SHA-1: 56822c3f104f49b4d97ac6dc135b295751ab2650 SHA-256: 2e3033705793444a2a3c72c29be638b84465f1a136797f096dfcf5be61c9c232
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074160465d48---64827759242.pdf In PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff77a86b0b---saxuvapogenitofenunesop.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/aa0a587427f86899fe75ee509dd8bc33/zabipunelojiraga.pdfIn PDF document text
    • https://activepymes.com/pub/file/70917750628.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/62635070882.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/s8hett3bala7e62b6s98164b7m/vudejokuvemuwuperofose.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab6b560dee---9469267960.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2a092636e---63129883900.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/16195ac58809daeca6d59f837573ebe1/nijiritufisikipizizejoja.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084dbdc34cdd---61811687402.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50fb4dd58---43737625752.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a250fb945c7---93390223068.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/14291879701.pdfIn PDF document text
    • https://songhong.info/userfiles/file/22435983500.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607033cb320b9---58043333939.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1f599c7511ef4acc1c9e5dd80d6d0566/99242671308.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/guxot.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/47991146551.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/a404b5c7c987f30c7afb064ddb0334f1/mozavo.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/69098554284.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/46688492636.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/sukuzumonibuzogomud.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/37191202415.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/11442145350.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d248e018b0---72778410882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=best+sports+podcasts+2020PDF 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_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 17648 bytes
SHA-256: aafc86356ccb759ab827a5a053df27f6a6c63859a69c624b7e94ebbbb75c0678
font_01_sfnt_off000137d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FEE 10560 bytes
SHA-256: d71402b0064814af4e5177d5ead08a93e5c197b013e473b873afad45bcc9fa85