Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec179e39b980a71…

MALICIOUS

PDF

84.5 KB Created: 2021-05-24 21:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 710c19655464ec98194dbef6a58052ef SHA-1: fb37bc1b495c8f4980556ae5a5ebc17a1c80c378 SHA-256: 2ec179e39b980a7100eb5fb66f882046ecd66eb88544055f249a0babbbf152a1
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution vector, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8245

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=graphing+cube+root+functions+worksheet+answers+kuta+software
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0i8gdbjmqj4hrd4qrnq3aih0d2/vageloveteluzumasuremof.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a95537025---mobafas.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ir98hu2hg26t3voem3r2p94gul/jumumodukapebo.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a50604083a0---mijukoxoremukiko.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/32171061779.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed26b9bd84---pulakirulixukufoxijuki.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bb03da49---25481981736.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087a177dc96f---fiwevisefofuxulurifepa.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dcb1ee6a6---95590063709.pdf
    • http://domeinbeverdonk.be/assets/files/file/wudozu.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1ca758e6f---jemudivunu.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/khfp9oc5doabdaisjcos9j1m35/54099561211.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa714165a4---jedutagedoxo.pdf
    • http://www.anclupnapoli.it/userfiles/file/kebewowijalati.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/udo5tfuq469qjff6tdi0pl0bk8/rapuselezonedurixilid.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/7beb55f87dfcf0ada3617359794ed480/navanet.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a444bb66aec---jafupadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c38.bin
8c58ec11854ba2ecd4d175f5370aebe67cb0111f1440f937de4392bc246bf12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C38 5572 bytes

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