Malicious PDF — malware analysis report

Static analysis result for SHA-256 217e497e2829db2e…

MALICIOUS

PDF

82.8 KB Created: 2021-09-18 22:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b72f0fc04f103d004358ac31721e28b7 SHA-1: bc7415d3c3a391ce5087fc5639c6901e97a8224d SHA-256: 217e497e2829db2e4731c57ee7c38803cc7398e9776b66db12c6778e6bef3a12
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs pointing to disposable domains, indicative of a link farm designed to host malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=halo+2+product+key PDF link annotation
    • http://yeongwonenc.com/userfiles/file/kapisudofevu.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/74764623946.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/44291415174.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614032263df58---minapi.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/63235849835.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/xetisalufunotenep.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/46184343506.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/8184260602.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/52660720024.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210916235834.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/duvebada.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/timefosofi.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/90887484397.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143fddb93996---tuzetoralikamirek.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/biwitidoletofonuxaponito.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/bowet.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/36913471074.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/15811250356.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/movopixalafexa.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/59981857378.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/25615273638.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/fomeziva.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/ramufa.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/jozoperoxaxur.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/sefiwuguzawi.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_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 18904 bytes
SHA-256: f2ef3cb9edc37dd8c42010ea2012f752dd094cb4ff53106cfeba10f55bdd2d9f
font_01_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001256f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256F 10560 bytes
SHA-256: 2ce801750dc761f0063a22ec8e790df7bb815bee70a33ce66a7c956b41bb9ae1