Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e03241e52dc02ea…

MALICIOUS

PDF

76.5 KB Created: 2022-05-19 18:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 8bf15d0b4ced6ccda0563c8cd7259820 SHA-1: f7b25a6c190426edc94f7cda0efd8c106b104a5f SHA-256: 8e03241e52dc02ea6a3e4f854655840cc246dc314a5266ebf6675bef4c72ff6b
126 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 a high density of embedded links pointing to various domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and numerous external URIs indicate an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://sunuf.co.za/YmrXLWy8?keyword=libros%20masonicos%20antiguos%20pdf%20online%20en%20vivo PDF link annotation
    • http://bargiel.com.pl/ckfinder/userfiles/files/nerexepefubelivogutixo.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/42662287534.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621290a2dce7c---10590647831.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/55207499273.pdfIn PDF document text
    • http://sinkrontech.hu/admin/kcfinder/upload/files/49867814797.pdfIn PDF document text
    • https://promoform.coreform.it/uploads/file/77640326450.pdfIn PDF document text
    • https://lorurofesun.weebly.com/uploads/1/4/1/5/141572265/5b22c1d7ae4b.pdfIn PDF document text
    • https://sovitinalul.weebly.com/uploads/1/3/4/8/134882068/bujenudulupif.pdfIn PDF document text
    • https://gabelutabidos.weebly.com/uploads/1/3/4/6/134678244/zosixowuzifawap-lekuwabofa-nakebuzinezu-ramujes.pdfIn PDF document text
    • https://tonixomakotej.weebly.com/uploads/1/4/1/2/141253677/jesafukivur.pdfIn PDF document text
    • https://dtcm.meetingmindsexperts.com/multimedia/userfiles/file/supulizetugekigeza.pdfIn PDF document text
    • https://jujowoma.weebly.com/uploads/1/4/1/5/141549126/9991465.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/58987254585.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ff38d373a1d---43741956229.pdfIn PDF document text
    • https://menimewutezosel.weebly.com/uploads/1/3/3/9/133997121/fb3fe5a4.pdfIn PDF document text
    • https://oasis-travel.ro/files/puzaxuzilezurinanexuxod.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/2453e9e48a7.pdfIn PDF document text
    • https://mizanupiw.weebly.com/uploads/1/3/4/2/134265802/6a979f466d65a11.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/gafaxilo.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/wemuvonogunatumuvojobusek.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_off0000c445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC445 11224 bytes
SHA-256: 3649a9b8bc199716933e2bdad710776db2f580a3347b523f3cd02e325b8bc630
font_01_sfnt_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 17748 bytes
SHA-256: 5e4c9dc89cdd85876086eba78e31e980fd9958a2630b7a51ca2366d7a4c0de3f
font_02_sfnt_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1