Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa1b327d72ecab9…

MALICIOUS

PDF

118.3 KB Created: 2021-07-21 02:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dc5372b113f918da52bd47ea37cef748 SHA-1: f94dd25e36241e5cffc69cd0119611bad5426db4 SHA-256: 9aa1b327d72ecab9dbf8ca613ceb1a86fdb9cad789ee2b5c874cc406742508e2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • 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
  • 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://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/u3tlhnvd4brsbgsbqsh3c4iof6/gasiwimaxuxalurafapuxutub.pdf In PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/k086prd2r75109cfr4kfu3e9av/fomoduzomebijawarup.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1af9eb593e---35619556152.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/84599298525.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/gobaguzapavafawawa.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb749776f---kegipabexave.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/memusiwomaxajexima.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210528053556.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/rutmmdf135vtqhtjnvemvb6mdi/46418030322.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37946ad58---95711738597.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/e58kvs86q40efcme935a0qgsqn/lejonibi.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/domizifubawakomujelutebuk.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16079efce81c9c---talenelubig.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0c0f6fcb2---tofuliweneteromatoxa.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6cf4d0b6d---21022291037.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/sagisosudafanufijufuxa.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/poxebitefevofa.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084836b27cee---ridobebujabitoge.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a18391cbc0c---92323912954.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/327fb7c3d925e29bf3ecf63d438bd750/volami.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/171549127593.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160755341449f6---25183351729.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c975765c036---bejezukiwerepo.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/8tg55hgbndubfk5k6t9tfmfg02/wofed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=catching+fire+discussion+questions+tracee+orman+answersPDF 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_off00016cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC5 17084 bytes
SHA-256: 9b6a03c1f384630fc69f83b7bb8bc73a9515b8b9ceba25d3c559b19e8abdd713
font_01_sfnt_off0001997b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1997B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B192 11240 bytes
SHA-256: d6dfbf62aa2b0fbda48678cc0646ba1f738fd6c43bd6a43ab75351e172201826