Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d19bae2ecd500d…

MALICIOUS

PDF

84.8 KB Created: 2021-07-08 13:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ced742937a94a14eb6bb8b9786d97419 SHA-1: eab08e4d265b9826d95f77316bd9b10f3b8ee1da SHA-256: b9d19bae2ecd500d14b997e991bea23322be10b74de717102bd5c545c85ec46e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the extensive use of external links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://pistant.ru/uplcv?utm_term=half+life+order+of+reaction PDF link annotation
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/46df2badd8624ed9de5264246598306c/kilizetepepezopijotamaf.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/3a2e5ace5e654da959aa5486848fa83c/wovijozilef.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/68450532190.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/8634131500.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/22853707580.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9914eee904---22681271599.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077567884430---68341161583.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/bc8pl0u7j1unda5s19j021rp86/logunotokavemoginipekun.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d8bf977260e---nozopebujukomisokexano.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21c0d3d6c4---86279279990.pdfIn PDF document text
    • https://majubesar.info/contents//files/webonuba.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8f6c8c8e1998ec8c5560f2b33deb1bcb/gosekem.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/f271e9991854a841459866251e465d47/benibaviliforitowolipef.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/d9493bef959cd90e3123ec1977454b17/wudogufaroga.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/974987389.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f209ce1ed9---mizaxujapamesavogiregesul.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/vijeduvaragazupibabolol.pdfIn PDF document text
    • https://artbynela.com/uploads/file/10639602297.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/cdc480184374859b66af9f54c173724b/firerilibejoxawaxe.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/n1q8md8oamv35d732a89ekn4vk/bomijapejuzu.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/sewew.pdfIn PDF document text
    • http://cycling-software.com/files/file/xitivuvelipaleni.pdfIn PDF document text
    • 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_off0000e730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10292 bytes
SHA-256: b833f88969b76300ee60eed43c75159dc1688e7282c47c891b6c4165571cc643
font_02_sfnt_off00011672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11672 17924 bytes
SHA-256: f6d73028bb0f727042f1850d2f1f56caf1c89e403bcdeebc72304e5da2c50539

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