Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4661487e1da0ed…

MALICIOUS

PDF

82.9 KB Created: 2021-10-11 00:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9485592691ae9e3bbbadee9e7733e7a3 SHA-1: 925ebf7c26e2cf12534b7380344faa8ccba4078f SHA-256: 0c4661487e1da0edec0e21ab8fdf62d71265a7a4686a1e3495ca667d9fdff087
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to compromised websites, indicating an attempt to trick the user into downloading malicious content. The presence of a visual download button lure further supports this phishing-like attack pattern. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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 http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/goduxipezinokota.pdf In PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/dejekewuvufotofuwonuj.pdfIn PDF document text
    • http://vanhacollection.com/images/files/magivufolaxawebifini.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/sewigonizidinixojebowejuk.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/buzegof.pdfIn PDF document text
    • http://automag.pl/userfiles/file/fiporeg.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/popuwonokixita.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147a4eceff65---dogikojonijesebedalaz.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/sexuneju.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/40871386151.pdfIn PDF document text
    • https://digireg.at/upload/51745360011.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/vadokemeb.pdfIn PDF document text
    • https://askisan.daynexdemo.tk/upload/files/72979295815.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/22895560111.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/46526026428.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/54070337930.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/gasemovamadiwanuxaronazi.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333bf0b1595---64554309232.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/10306784886.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/95237298380.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613026c5a3b84---tonuxitakinag.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/xafezazebenaset.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/14267128239.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614708233a20a---sisegawitabujakiruwo.pdfIn PDF document text
    • http://p-energo.ru/content/file/sedofeguxat.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16145251b8e806---tukosowetovofutor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+shadow+of+the+wind+pdf+downloadPDF 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_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 20696 bytes
SHA-256: e503010912474ada7511916eaac58f887d1ee23097eee4fcdc48c31da1f840a0
font_01_sfnt_off00010d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12590 10544 bytes
SHA-256: cb77ea3f8cb0e293e8bc777b68f1b39e53bd7f66bb3a98f4744d6b82ae8be44f

Open this report in the interactive analyzer, or submit your own file for analysis.