Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46e5c8bbf823d0c…

MALICIOUS

PDF

65.2 KB Created: 2021-05-22 07:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63852b62aab8bb28e733f95b7d99a392 SHA-1: 8d81f5e32772f1dd0c72c49be244a9088e89c3a6 SHA-256: d46e5c8bbf823d0c147a6ef7e9824678f3dbbdbdff789b238bcc3e9645f642dd
124 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The document contains numerous embedded URLs, many pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of external URIs and link farms indicates a phishing or distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9771

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=que+es+fuerza+electromotriz+ideal
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430083258217808.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3470920d1b1b144f693c70339e6d7ac4/31685452531.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f70c49980e---mevapileladurajetite.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e85b24a5d---vokaroxuso.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/qqbet09nm5efrolorfnfjmje6v/dixuf.pdf
    • http://eltonltd.ru/sites/default/files/uploads/todam.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/vuxepowunukokilobaroxusa.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfc90b1353---fovasupotowisazufisitiw.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/3eaa981db8353d45597da31af515297a/30923074139.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160987ab45baaa---62601875000.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d4c5b3eef90cab8622f72dfa7bc1be9/47553175836.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02988be0c4---18695482963.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffe96954af---33441179041.pdf
    • https://airshow-bg.com/file/waxavivejap.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/1201752b94978343b0848d1a726df98f/rurozejofo.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5fd174446---nakogoxepebobekatofuxusud.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160837118c9b1c---fovelamup.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_off0000f0ac.bin
2d6f77e161050e34b1c96a05975afb7d29380753767267d7361a50f7cb1b5232		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5276 bytes

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