Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c9ee5f8ebf72a1…

MALICIOUS

PDF

97.5 KB Created: 2021-06-19 22:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66e91bbb11e5e0827af28da145ef1552 SHA-1: e966456fd9282e9efe133b79dddc47d5e4e09dfa SHA-256: 62c9ee5f8ebf72a1c6d2e24191244be99c36550e3ceb2f7e2c079815f4caef60
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 http://carszana.com/image/upload/File/jezisaletilibuw.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9da8806a0f---miraxumukewibotipiximowu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3fa81b5f---nojavupewawovubizuma.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/gemuza.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/nvotuc6huh827lp1aibk1ksmc8/wabapaje.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/jibunivug.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/wixilesifameguwotal.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6990308af---jebuvawelezazes.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b3945ca13ed7666c7dba55b247804c28/zebimexezitezekaweb.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/6851145193.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/1u4rf0b53mm33hna773ioa7973/54189372681.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/k8vu8g4j3qs8ti6o5t0jhbj7r6/65368982644.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/81607955d65e54cd59ed423da298a9a7/59742713049.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/jasasodipetevageboxuden.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7d96e9389fd595a7451d5be6551da6fb/7073771044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=bachelor+pad+economics+reviewPDF link annotation
    • 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_off00013bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD0 5512 bytes
SHA-256: 8f67c626d8e263ad6676b9ea9568de65294f1aade33f8d76018c8373ac5b4b37
font_01_sfnt_off00014e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E71 12012 bytes
SHA-256: ae734f27d5bd4c7b8d077525ef9e52e2010fb8b032d70f0daaf20aa846b8ddaa