Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f6cc2276bee8f5…

MALICIOUS

PDF

75.1 KB Created: 2021-09-10 07:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b300329922ac155e16156b72ee0b574e SHA-1: d10167a49c77c05566d1a19ec6fbaa8f88e6773c SHA-256: 89f6cc2276bee8f55a6f28ea150a2147dfcf37616a28c1b825ff392751d80dc8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users through these links. The embedded JavaScript may be used to further obfuscate the malicious activity or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=discord+bot+designer+mod+apk PDF link annotation
    • http://chanhungcorp.com/images/uploads/files/dixudusoluxuzixegotuf.pdfIn PDF document text
    • https://jss-moms.si/upload/File/pesojan.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/pupoxawimi.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/46167919566.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/wexenawibovazidukojati.pdfIn PDF document text
    • https://fond.ru/userfiles/file/jukew.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/75053568424.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/29429149325.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/ronodubenegutezagux.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/9594767007.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/88078636793.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/xelunejemolevo.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161382912a42fa---27885721407.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/94556567193.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/40328819169.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/lefolejevonoputowa.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/nisekezujoviz.pdfIn PDF document text
    • http://riversedgefm.com/files/file/70152625658.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/7762106545.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/37928743309.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/k7jtrldrvtgidvm5lvq00r86hr/38130574882.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/17839477628.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woviguweliresaletufojew.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_off0000c059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD870 11044 bytes
SHA-256: df855ffcf59fc542ae340e812c4779b83da10429e0e5da5c361a9b3d12fb2128
font_02_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 17396 bytes
SHA-256: f53356d23e449e79d0ab4bb0bcfa7e8fa40c745cc0b34f5dbe3ba2ae1ea8a37c

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