Malicious PDF — malware analysis report

Static analysis result for SHA-256 7644f5fadfca8fcb…

MALICIOUS

PDF

72.1 KB Created: 2021-09-05 06:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 75379dea276b5440216321a4b1b22744 SHA-1: 61792fff7f103a0a00d9f660ff79afc73cf453f8 SHA-256: 7644f5fadfca8fcbdf14051a7ef9045aeac73ca22e0c6e98a6f19b4e09effbbb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jbdclothiers.net/emailer/userfiles/file/zexanebajunasiravoxag.pdf In PDF document text
    • http://mediedil.eu/userfiles/files/topawurexororetum.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/subejedekozeliva.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/203cce5e547cb186f04996a4dab20498/fifobisikum.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/jakeburepatefipev.pdfIn PDF document text
    • https://seerupit.dk/assens/file/nobapevokoruzena.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/qcsnck2qfrqepq0iijs99i0piv/xibetosidu.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/97001975466.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/51324993364.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e9131831cd7---92514507213.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/73917827894.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/ce9a07ce9d4e1375610c517427e85673/gekakesa.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3a1e3269---90268110413.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/xopuvamavadubuxebilakaku.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/35483951583.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/64779575820.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/lamekujaze.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2122461416---jibet.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202162959398381.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/bigawolilajosiwu.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/995329172.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608840e0001e4---10889324716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=periodic+trends+atomic+radius+chem+worksheet+6-1+answer+keyPDF 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_off0000b802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB802 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD019 11236 bytes
SHA-256: 4f1fac211c0d7d1b9ad6bd909530eb1a1730a4d0c01685621194dbe57fae58ba
font_02_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 16064 bytes
SHA-256: b3df509ab90eb6295a1804a5a2f0a588e329dd476f0e01d3788fa7ecd61fc992

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