Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65e5a0e6d466679…

MALICIOUS

PDF

86.1 KB Created: 2021-07-29 16:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4fe7a51e2c4e6d313a24175a16fd4f3c SHA-1: d35af67b4f164e9f8f7df89c8f4102b744d82fdf SHA-256: b65e5a0e6d4666793f1e2fbba9a4ae55d23a4ba5c3a3596a0572f74464e7a935
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates it may attempt to execute further malicious actions or exploit browser vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://panama4d.com/contents//files/punewenidokitasenod.pdf In PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7edd35ba6972e191af2a95265e834cd0/tamenaki.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090ce0254af4---83604039641.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/69685429835.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/subuwezuj.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/5439650513.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021531230477847.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80d0552321---folotobuweratub.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210602_090141.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f556bc36a---ginupovosoxezezef.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/zedakasomidoda.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/jubizumon.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/514dcdc6aa03ffca730c473cea73eeb5/74747111509.pdfIn PDF document text
    • http://chhsclassof64.com/clients/b/b2/b21d6454c74b38f294a67049e63db9d7/File/28724623782.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/07dm1e196q0o77kjuk3eqouaj3/64946177866.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/xukizaxuwofowixuzekiga.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/805c9f96a42902173c216e8e67989eb9/8404482308.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/bajovibujuju.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab52324f993---52640861213.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/46476800375.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/reperoruxox.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/64900533830.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/6278958306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+print+wirelessly+to+hp+envy+photo+7855PDF 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_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CB 16900 bytes
SHA-256: c3621a1668d252547f7568e24efed0d688a3daacc61dc888f4f38d4fb1d01a48
font_02_sfnt_off00013160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13160 10836 bytes
SHA-256: 7a7a031152d916de97f81a2130364bed6083e71b25907c26d26e11797ca0ea3d