Malicious PDF — malware analysis report

Static analysis result for SHA-256 65af0e32521a8487…

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 10:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f6fd45cfa3447092844a7a666117650b SHA-1: e0f2da5d8f4378db3cd0356f9ef7b8aa2d4e18aa SHA-256: 65af0e32521a84879752c29f4e5445b340ecfcf79b583f070c2a986dc7a26a1c
104 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs suggests an attempt to redirect users to potentially harmful content. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://manenshop.com/upload/files/torivotelakerexusara.pdf In PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c8d34913c---54302849860.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/46835307721.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160982e38f32de---14534299370.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/6f7110d382407cf124d3fe79255b919c/78462783492.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/zavas.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/gekisapewapaza.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1a8fa3c65---vibuzinadaxoxusurixedib.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/u529v99iiriauqaaisfoaoai83/boxudulukubi.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/44371741437.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/a25l6j9nrb1ritj0d23gdvde15/55316753647.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2156e8893f60bdea6dcb431cf6639ca7/18507308687.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/kugegimetiludupumawamawel.pdfIn PDF document text
    • https://riwg.in/userfiles/file/98035908641.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074c22bcf29a---11274666198.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/rugezoxozubik.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/bubuda.pdfIn PDF document text
    • https://eklyps.net/images/file/21933495647.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3447ee58---47847332888.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804bdee3564---25233204253.pdfIn PDF document text
    • http://jonme.net/ckupload/files/wepifalu.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/vibilekitobegur.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/75243891629.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec4cbea89c---14913593953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=antenna+and+wave+propagation+by+kd+prasad+onlinePDF 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_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 18096 bytes
SHA-256: f0444bfdaba42e4f19100b1e34a1d004c94762d255c6b766a1afab9177ff32d3
font_01_sfnt_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 11048 bytes
SHA-256: 2393083c0146d17c33679c112d5256affcbbac952aa07175a6641e69edd60d8e

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