Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e72d2759543c6e…

MALICIOUS

PDF

78.5 KB Created: 2021-09-03 16:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 351ef0be0fc01aa32de4de99606134df SHA-1: eebaf851c62a01a3de6f7a023f735d9d01aec9cc SHA-256: 47e72d2759543c6ecd567fc566eeb7406810b0493ed69d1e9ba7fdc0f70d4f0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072ade7270a1---92260322678.pdf In PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/r80lrg82ssg7n2n8bd0cntv09g/disobanu.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c02b2c6853e---42588376346.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/87935831849.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/61370927207.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/5c1ade7e8824e67fff5eff5544a53656/42464493429.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/47142996987.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/61822950608.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/tekunokexotiduxuli.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/87512355978.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9757a7205a---86432693483.pdfIn PDF document text
    • https://htchninc.com/d/files/57254573375.pdfIn PDF document text
    • https://watertorens.nluserfiles/file/lopafoduwudutevo.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210626141719_NjAwMzM0NDM2Njc=.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/e4570b4f5fbe5126b1215ccd254f7d25/poxuvesejesoxagulofotuvew.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/wasudisopod.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210523191617947.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/tinunevurepagon.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/28721903543.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/tidalujezun.pdfIn PDF document text
    • http://araonline.hu/uploads/file/94024766925.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161057d88da4ab---57459592147.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/d9eca6765bfd5a4022e8407b4fa87298/74777949849.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/robazusujidutesaponuduxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=colligative+properties+worksheet+with+answersPDF 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_off0000cb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6E 18036 bytes
SHA-256: 351ae41f87df90967377ef4bffacc4aa8ee739fb41b3ac0ffc858b1eddc2b822
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 10808 bytes
SHA-256: 17e864c3cd3a6bcf475f6e9affcbea9f422a3a3f4be6f04ad9e3378b015e3c03
font_02_sfnt_off000113a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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