Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a02b256ae76f20…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 19:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 098768a2c9bf7fffe69c2152f04005a9 SHA-1: 82cb79a2335e832315367fb0d642846828ed6328 SHA-256: e2a02b256ae76f20596b51e1405ca0ef386a7541ffde16be72394608ee4354a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing trojan, with a high ML score and ClamAV detection confirming its malicious nature. The file contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://internationalnetworksolutions.net/files/ In PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/97703416589.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/kudagikexakamu.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/nonorefuna.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/76425176540.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/35137582350.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/73643425751.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/9958390058.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/18977954068.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/rajojofenupavusewe.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e5cc80209e39ab885f947c9a2230d118/negosowoxuxigakevija.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095e02c2175e---vozolodizefidobibab.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/bewifuzorirogivo.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/34937428074.pdfIn PDF document text
    • http://turnyras.lt/Files/file/19365180831.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/2etlj7q7cicftod0me98nhqan3/musawolekug.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/46152520150.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/68406767724.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/lobumazepalovalan.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be75bf69cc9---farisefose.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99707e7b0f---winexedasetow.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/97238933927.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/89173308767.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/53309809361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=very+well+likedPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 9848 bytes
SHA-256: 55ea651f452e1561526635d9b51b08b74838bbbff680dc5799674909c03842d3
font_01_sfnt_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 21424 bytes
SHA-256: e0cfd340fe93d041daee8e1648faaa7e03eb0d22c15578387aa679ab249c4b7c
font_02_sfnt_off0001259c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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