Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a06250bae11a15…

MALICIOUS

PDF

78.2 KB Created: 2021-09-18 12:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9a6a9f7441dcbfbfa0ecfe5ce365845b SHA-1: 4ae42d8b105bba9098fa3a99c67f4254feb71838 SHA-256: 99a06250bae11a151dcb79ce9d74e59b0abd77da07f94feed8287cc8e9f444cc
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and a heuristic firing for a 'link farm' on disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading a payload, possibly related to the 'jurassic world evolution hack apk' mentioned in one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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://www.renouer-auxerre.com/ckfinder/userfiles/files/9945839492.pdf In PDF document text
    • http://www.centralperdana.com/file/lijilapilewowavataxur.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/napumininif.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/jokoguxewijoli.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/bopogesovepidejivaza.pdfIn PDF document text
    • https://nexapos.com/upload/files/refagopotenibedilereb.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/bbd92c836295bc4976a425be7f8d23cd/58236697720.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406b51ed13b---8736573963.pdfIn PDF document text
    • https://chptravel.ir/data/file/58032067003.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/losapigire.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210904155749.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/10534621644.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/65925695994.pdfIn PDF document text
    • http://web5gstore.com/Files/files/61721276199.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/54368505340.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/fiwuzom.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210907_1C8D518A79A6AE4E.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/93183723736.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/85721165387.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/26299343603.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/89279737575.pdfIn PDF document text
    • http://elpijisystem.com/file/damatapojiwabagusumagawo.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/wenoduxukep.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/37789886631.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/kuxajejuxagopixexof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=jurassic+world+evolution+hack+apkPDF 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_off0000c760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF72 19760 bytes
SHA-256: 31f0d01c4bdebc7efb3439b879be8ca17cffd6694fff0ea1cf95898090efaca9
font_02_sfnt_off000111bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 10948 bytes
SHA-256: ef5c4106ff992b4d0053d42cbea8dfeb07aae069cfb184101de3c02af75fc7fe