Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f5e8a07ddbb1c8…

MALICIOUS

PDF

73.6 KB Created: 2021-09-01 11:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c8545b8e6225d32dd250bb9c2c490a3 SHA-1: 2c2cc19b2f013703562aef5feb11a12630ad9d7b SHA-256: c6f5e8a07ddbb1c840fdb6926e1a66cbff2d501f5c3b37078d5843497e1c68e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of external URIs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or deceptive content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://union.travel/ckfinder/userfiles/files/karumesotipaleruw.pdf In PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2425496c---jozixosipe.pdfIn PDF document text
    • http://asfalon.com/__files/file/popovozusegomiwadobex.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/08056d04172d5bcd05f358b1d1460a7c/91521518251.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/55937461279.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/dizozisozenukezefubedi.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee57dac8ec---lirimojolejovukoj.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fde42d549---3125648960.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/29698799999.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/59669bc584ff7b946cea8268ff5b2822/4939037088.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/8f81209c372b3de2633c5f6c03a8fee6/molig.pdfIn PDF document text
    • https://castel.ro/userfiles/file/71402772981.pdfIn PDF document text
    • https://dragulf.no/files/file/wirugudikuz.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/63945381328.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/55369006030.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/rosukawojirup.pdfIn PDF document text
    • http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/puduvibef.pdfIn PDF document text
    • http://japhina.com/upload/file/wemetexunavadujavo.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/gerojiruja.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc32d6b44---14646846147.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0fc03072d---75290022092.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22f0c5ae6---68497168231.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/relumujijovipawasuku.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c4993ba2bf4---wixufupevigelaral.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+prepare+balance+sheet+from+trial+balance+pdfPDF 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_off0000be29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE29 11104 bytes
SHA-256: e44340f39c5d81f01d9411a66c0cd1cb760a51cdb69dcfed7f7897fbdcad5a8f
font_01_sfnt_off0000d79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 16172 bytes
SHA-256: 17a1ed1632e4d3dd7d2feb829d988f8174d3f3f638b0a5435e14d30b0a11446c

Open this report in the interactive analyzer, or submit your own file for analysis.