Malicious PDF — malware analysis report

Static analysis result for SHA-256 4332390128b72237…

MALICIOUS

PDF

80.3 KB Created: 2021-07-07 02:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b45f9b25859129c09b84eb550c9fb08f SHA-1: c46c3594d5b1a6ed6e44c4cbc5ff4914ad323969 SHA-256: 4332390128b7223774984d4a46ee312fe63f9eb6ca1c818ac842da1b0ba66d5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that leverage embedded links to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5544

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=how+to+use+a+crafting+table+in+terraria PDF link annotation
    • http://cy2hand.com/userfiles/niverinalozasiberofozu.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/22176037323.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa205eacf61---dasokunefal.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/33014841782.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/61941928209.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/29917271304.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/banuwisifuruxoteziwekovu.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/494920da21dbcbe16626a2dba5282ab1/zakejiradi.pdfIn PDF document text
    • https://aashianarealty.com/file/62758486284.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e361cea7e---tazonotamaxitomugonarix.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/vizukagataf.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/fugepesijam.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfb805675b---detoboxem.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/16155516240.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/q9es8nck3vh6d4h6gr9v6sprv0/34807293306.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/bab2fb1638b5e0c102052dc628e312f0/fumeporaruma.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c67eace75---43712038089.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099fd4eb12d7---jamuluwuselozuwavudoxiw.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16096025daac21---67662569643.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d00f6fb8d---pogerejet.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836206e234d---xatuzikusorapugupum.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 10828 bytes
SHA-256: c6528a0e27c3d9d8d214864c515973960ded16ae41e9189c38d8c6cb8613327c
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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