Malicious PDF — malware analysis report

Static analysis result for SHA-256 38eb1745ae3d6b78…

MALICIOUS

PDF

200.5 KB Created: 2021-08-17 02:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 49d68b88c1c77f97a4e2542bc613b2cf SHA-1: 13d1454d8e446992379051576c51c03b5651641b SHA-256: 38eb1745ae3d6b783cec92e4698f381243cc6444831e53ed3dfe01d90f9c98ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with one pointing to a compromised WordPress upload directory, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.
  • 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 http://essuances.com/ckfinder/userfiles/files/jobezulil.pdf In PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5bccfd3b8c---1019841356.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/93121164338.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/5031942933.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107e86be5da1---9997511652.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b63931287---nifofib.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/80754823891.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/59495321a960c477d998af1db12008d1/pututuvokizegakabepupap.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/xidularigorixefomikuju.pdfIn PDF document text
    • http://nfc.soo.jp/file/64023594946.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/zogilesevakumekojagib.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607246d669f8f---xipebavanadejonaxi.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/31841771901.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdc4e1f52a---dozigojuneworoso.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/bb58aldlaodd2fv5q91flhlfb4/51042597510.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/734c63e0b49c539dc3689c6f0ffe2cee/23001343353.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094dfee5fc6c---kobiwabasazekoxe.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/33323052343.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160797a4cb00b2---voruxewasewidexik.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wurixaxudibajafubomimo.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/57351153486.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/vulevufumuxum.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5d7f29b3---nosavimepo.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759ac2a94c0---63411793443.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a06be02c28---dawefapozazutapavo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=los+7+habitos+de+la+gente+altamente+efectiva+libro+gratisPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29027 7376 bytes
SHA-256: 913db99a00f083ad363651023e0091d77693794a10a5c706482f8fbbfaf12d96
font_01_sfnt_off0002a8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002c0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0FD 21356 bytes
SHA-256: 49d60b4acba2c0c60e543d5e21a513275bf9b8ad620fd531aa90fe2e33ee87a7
font_03_sfnt_off0002f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6F6 11136 bytes
SHA-256: f2f47f68e5c9f3a4892244aff1a0d4ff7c532481b923ae17924f54e30d0a41f8

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