Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6b6cf5e5eb6aab…

MALICIOUS

PDF

77.6 KB Created: 2021-08-21 08:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 372196567050dd4fab8628f10932c73b SHA-1: 6766caac4e93bb562dde81e5f088690a39088bd4 SHA-256: 9e6b6cf5e5eb6aab0dd8f50c8670fdf82a690793837b3b7a7f14eee9b94bba44
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://dubaimotorcycletours.com/uploaded_images/files/43097965717.pdf In PDF document text
    • http://hhtaitung.com/CKEdit/upload/files/4247024691.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/buwopewurobaxowivama.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c136e2ce97---33962276864.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210630_81FDA11A6D51B54E.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b6e5e6a7---90546473777.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/zujanobogefofufelosabasob.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/fofojukiwax.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/bupebebejabozurixona.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bes0pcpul76d0nlgbng2e58896/76174544868.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaed145f74---tuwoxamovamiji.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/8918062536.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/20920018195.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/fibixejavobumopedatufe.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/kokotirufixopen.pdfIn PDF document text
    • http://m2m2design.com/userfiles/kosexixeworaremivaxef.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/xodiv.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/960d18189408ce4f4ab9f68d1aa1b967/13951913340.pdfIn PDF document text
    • http://www.umadai.com/ckfinder/userfiles/files/64928958292.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a6b711e763f8b82c6cdbf40cc6d89568/dugag.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/gunitebejeserupagak.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/2750118516de41761ae8cc345d3ff47c/84090697692.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/11f3eb518c9d3c5fdcd7e1878fc86c9d/62599440078.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7dd3f0750---solasuvix.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/kasenikepebizokegeganixam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=amc+security+pro+code+2020PDF 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_off0000caa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA1 10800 bytes
SHA-256: 224eff25150543821a3954d7446702108d1b410bc591597fcad09a2b10346294
font_01_sfnt_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 17324 bytes
SHA-256: 327083f53aca6959f6c15b8a064b3c452c95fa79706e0178c64ad6927c2c2472
font_02_sfnt_off0001112a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1