Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa29f1097da4373…

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 18:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fa7a244ffee72366371178c425cef406 SHA-1: 7b10c14db5ce6a76098fb58ee4007111624662a2 SHA-256: 7fa29f1097da437385eb2e7f40adb7e0f5339b400bf7262231461b67b2c37f7d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, suggesting it functions as a link farm to distribute malicious content. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. While no scripts were directly extracted, the overall structure and URL findings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/29fb0e291d4526f7b133862df85a47e7/77620875587.pdf In PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/gokudewudosukutoposovu.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/fe599e3fb2bdb4c6b4131bef0b69ae33/5212129559.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ca6623c0f44d01d9a4038ea0fc9bd61f/24563606928.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aab8353ec03---laledani.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607699329907a---gopivetumewedajenew.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/53924790898.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/10371524064.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb2972960---37964064842.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/336388c9e53e100bf8e7a3eadc7185a3/92193836091.pdfIn PDF document text
    • http://thedigitalscorecard.com/userfiles/files/87990319836.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/11ld439tdijjof6mmrt3o37se3/vezoritom.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/bonuxivux.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/lagozatove.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607720ab4026d---90366500086.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/52360238012.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8b2d43613---gojinitezena.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/tabagotipulevodila.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/12049520902.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/6jk46u9i6hl15hd703dusk37s1/74365931996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+sites+to+download+malayalam+movies+for+freePDF 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_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 16880 bytes
SHA-256: e4245099f6fcc994a5b8da6e406a9fb835f37f3de878d518a06744248bad3a5a
font_01_sfnt_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F62 10836 bytes
SHA-256: 15aeed963064f4216d33986aed1d77d45f1b1bb41703124178d143d8f5408922

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