Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5859915bda069d…

MALICIOUS

PDF

81.7 KB Created: 2021-09-12 10:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ef30f1d90243076b6db64ba981d61dc7 SHA-1: 6ce7b6f84a685554f0641127adac38d926929374 SHA-256: 8e5859915bda069d14a1cd3cfea60509f8b5bce550c119bc149ddef25c47af2a
134 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability to execute code. The presence of numerous embedded URLs pointing to disposable hosting, coupled with a heuristic indicating a visual download button, suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with attempts to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=brothers+telugu+full+movie+free+download+2012 PDF link annotation
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/67319902086.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161337c108d275---jolesuxapajimuwubuworaxep.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/27443115913.pdfIn PDF document text
    • http://davcpundri.com/css/file/48540703899.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/23080278785.pdfIn PDF document text
    • http://superazs.ru/images/news/file/fefofobopikapiw.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/fuviwajozagabe.pdfIn PDF document text
    • https://guruvinodji.com/Userfiles/file/xakujenij.pdfIn PDF document text
    • https://expomediainc.com/upload/file/13754987835.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/datinar.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210910190148.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/16861513974.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/wexovabikipa.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/ratunovonuza.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/83116731081.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/14edff695af076e11f9328adc14dd6ef/55456053360.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/54060202166.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/62436184517.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/46099882902.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/63057680400.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/93547910372.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/mogupusatefujovo.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/90444361232.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_off0000d982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD982 11400 bytes
SHA-256: 1dcffa8aca791d69ec1b13c8b73e4bd5223f2e620a802dd9e76519ed2c4aa035
font_01_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 17236 bytes
SHA-256: 4e464002438d252db9b7d63f40cf56fabe8fa00021e81cc2c5dc32e2ebc3dd11
font_02_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1