Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a4f2d4461e5294…

MALICIOUS

PDF

87.0 KB Created: 2021-09-14 22:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: de2a26ee32b9e1fc5e57b181f62aeddb SHA-1: f20bddad1955e5b8bd80bd123043faca776507c5 SHA-256: e3a4f2d4461e5294f09d63cbddfbb1ddaab918dc8875383b058548222552f185
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a large number of external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://egyptsuntours.com/userfiles/files/waxexewonidise.pdf In PDF document text
    • https://mokshadhamnepal.org/userfiles/files/55141681100.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/20764418776.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/6085950843.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/tedemitasukojo.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/fiwepa.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/kupomawunakoxuwite.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/gowiwaxefem.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/44706058023.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/tezepejo.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/54039210854.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/nebosedupi.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/julewigenuxeton.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/64374784377.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/dofijuwubikepikuvo.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/63999361577.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/12339014723.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/8634170215.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf6db747ca---dewesenemalajiga.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/85783733720.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613abe2daf022---wolutikupegufe.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/95443967753.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=csr2+hack+iosPDF 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_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 10192 bytes
SHA-256: 5ea3b5f5c5f93c6054b146a4a48fff583b6ab029538dcc4864efa4cf00a4d828
font_01_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 17920 bytes
SHA-256: 0d25a3ca91fc390fd7bbb3f7390569377410d5fd8b9a7bd7701a241572e4dd1c
font_02_sfnt_off000136b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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