Malicious PDF — malware analysis report

Static analysis result for SHA-256 484b542707718a94…

MALICIOUS

PDF

79.6 KB Created: 2021-06-18 10:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: de1d7ceffe81184a677e79dfaf1d7d14 SHA-1: 0b7e2ea62deb10329ed01517567e1b858cdbcabc SHA-256: 484b542707718a943d60dd200cc77caa3265897ba64b59128d4afd33ee725151
164 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 embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of JavaScript indicates potential for further malicious actions, such as exploiting browser vulnerabilities or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=how+do+you+build+an+enchantment+table+in+minecraft PDF link annotation
    • http://shinies.ru/img/lib/file/58461174304.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/53a3c88069eb37d7a04b471f99db914f/89712739069.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/15848818533.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/27160888956.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c07f00a616a---filuxojilofowazud.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/416325977.pdfIn PDF document text
    • https://stopserv.ru/files/file/vorazixubejowum.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c77348ed---50453416268.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/8889559243.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/3hcja00t4igres08as2ojjjf7d/jigakowujanolajape.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9165e2d2f---64559034390.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/648aaf56949f6e8eb49865a76047f348/naxab.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/bimokolalofipipaponadogu.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/tamese.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608337af32769---78256510200.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/wawiwi.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/46500716602.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3602bb2b84---75628445854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 5376 bytes
SHA-256: ed8bac64d36feb054d71ac033004bf282f387b94b91b470f8d313dfbe7083bf8
font_01_sfnt_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 11600 bytes
SHA-256: f54c5644bd1f26d73171a1368cf76af667a189104ba3fd8b250633755fd34322