Malicious PDF — malware analysis report

Static analysis result for SHA-256 beefc193ee2d4458…

MALICIOUS

PDF

86.7 KB Created: 2021-08-15 09:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 3460f978e315d8fe02ac1f1ee580d14f SHA-1: dae2cf280a58c9d87cda2fc2eb4c012704808241 SHA-256: beefc193ee2d4458cbdfd6a0bf61e590cb853d76f57c56a9015cfb75b8c9f517
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The document's structure and URL patterns suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=duplicado+de+certificado+de+bachillerato+ceneval PDF link annotation
    • http://al-bandak.com/userfiles/file/zozidisebaxuwoz.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5652bcb2bd---lokepavikupelog.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/rnha6mnpomou7jdbsdfqsmnuc0/51467701993.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/74725491582.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160da8bd4a547d---6778065061.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c52e7d9ba---9852813287.pdfIn PDF document text
    • http://katachizu.com/img/news/files/43596027857.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b06c08ace99---wagobajuba.pdfIn PDF document text
    • https://capecoralliving.com/media/file/11206957374.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160742a8219faf---wezagulalagapikuwazalixo.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/ruxobe.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160caf327dd88c---563932790.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8b05ea199---fawixuxag.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d950c9f9c---medos.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16091e279d2d53---zenabivosapopuda.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b424da80780---58257678828.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/waxemigepafa.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/jufoxotigifinowepap.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/89796120314.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/rakoviwojagijawijudigozix.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/gavopivi.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/26209833160.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2121072f38---puwikanufedo.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/duvugaze.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_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 18632 bytes
SHA-256: 9f2f6a4865b81482ab23c8aa2abc8f2b8b032bea70a7ae6bdf4833021d4f1f6e
font_01_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 10856 bytes
SHA-256: b91a7ddcf1db8e4dcd121b0a5555504cd24ea0e7c04b23997a3a001cca5145ba
font_02_sfnt_off000132c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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