Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d717a465b6f0d30…

MALICIOUS

PDF

64.0 KB Created: 2021-08-25 05:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2f98db4d5c0d758375c564eed8ae367 SHA-1: 176bd945bb7e20979cd58505f2cc5ff5d6ffa25e SHA-256: 4d717a465b6f0d30f651e725106f41e27c7ebb62eb93e7a116f98b916a3c2179
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous external URLs, several of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

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://pixomot.ru/uplcv?utm_term=strong+urea+smell+in+urine PDF link annotation
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/20669614001.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/wazexuxepogobibapopo.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161099e9505239---zogixojipujotipexajide.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072e260066a4---60024795026.pdfIn PDF document text
    • https://digireg.nu/upload/14302047635.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/wasuvalonumimoginixudok.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/78c60ba9eaa08499a2313886460ad670/tinazejuvanixukew.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/suwini.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/54893877695.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8493540ccb192baa6c0d71101aa3fe9e/44889506237.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/17530385847.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/pusumul.pdfIn PDF document text
    • https://mavibusiness.it/file/87341234711.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/51143268473.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/pupisotiromimubiw.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07b2b2e5b---dotogitomuzok.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/bamixinigigovojobebob.pdfIn PDF document text
    • http://nccutrackandfieldnation.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/94225999908.pdfIn PDF document text
    • http://e-sportis.com/images/upload/sudabumaburukizo.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/sivubenikig.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/sisem.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/lufilop.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/15697518357.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/jivivenefekudukimugiguj.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751dc02f142---jalumapoj.pdfIn PDF document text
    • 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_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 10624 bytes
SHA-256: 8e819086b4044ff2e5f4732374f5b0b296fe1458c8036d2b105d4cd5c0da8609

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