Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f3ca28b1434c8c…

MALICIOUS

PDF

116.4 KB Created: 2021-07-22 09:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c9aceaaede08df98a58e916530d694b5 SHA-1: 704df5abf682022e7c1ef101c71ea8e373acc10a SHA-256: c1f3ca28b1434c8c09785a3f30c0df2b08cccdffcffc851e4f328b5abde260c3
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a link farm suggests an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9394

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 http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cb68bdc3e---75956603595.pdf In PDF document text
    • https://atraba-holding.com/userfiles/file/44468962557.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rqg55abtrfi97g5sfk70ofhtv4/7609808304.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/3460a34409805d8a79463a59f17a04b3/70493514738.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/31098350656.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/0c998ac3438fee5578b7e066bf534e7b/34453294399.pdfIn PDF document text
    • https://kildevangen.dk/files/45082602841.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/97106205955.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/18439884244.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/33088121248.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/texigalufazerisugute.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/55725264883.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/58d630bc60cfe9a4b543557bc2318429/84979646746.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents//files/mitebi.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/24582653762.pdfIn PDF document text
    • http://senn1962reunion.com/clients/2/2f/2fc2c703930c5c120d54ce0350dd22c7/File/64507413720.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/mibex.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/872c252370409d42ad6226e5ce0f12b5/97972084678.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/19020289415.pdfIn PDF document text
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/98173200952.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/basejopirubotubavadaleku.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/892k61pciojbmrsffqrq1041qj/sulipefopiwobuvo.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/36631510038.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/4019f5a9604228fda897cbe2b64fe152/kabidusob.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f541fdecfe---15540173004.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=black+panther+tamilrockers+tamil+dubbedPDF link annotation

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