Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc1a9f8718cffe0…

MALICIOUS

PDF

72.2 KB Created: 2021-09-07 16:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 77bf28df4bb86e8d3dd3a258969eb586 SHA-1: 5044635c88b418693326270d047bb26aced8ca60 SHA-256: 9cc1a9f8718cffe0d1178c61ba41dc7472bf45bdd47dfd78cb6343f429a2ac56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • 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://wastran.ru/uplcv?utm_term=telangana+panchayat+secretary+syllabus+in+telugu+pdf PDF link annotation
    • http://mgtofubbq.com/uploads/files/33121715572.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c445b8971c9---40078063223.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607710291895e---60026010362.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/15737309114.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/8rie9p1kc5v9lqgk4sqa8ks0d7/bozad.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607135b8862cb---96983223892.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/26159846977.pdfIn PDF document text
    • http://premium-h.info/files/files/dapilifofokavajawekepiz.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/96aea01230b6949dcc06be22e9edbc44/98793614354.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/lopomuripavu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/sepoturar.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/pobilufe.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a03c53b89---medarigegufija.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/71818020638.pdfIn PDF document text
    • http://ekomeg.pl/Upload/file/morulekuvofulaz.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/39282199342.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/ligukobane.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5c8a60af66a779476b67f39e76110189/xodaveduxanesojotuz.pdfIn PDF document text
    • http://sibstroiexp.ru/userfiles/file/kurovejeb.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817376eeb0f---gebisuxubevepoxotakuvijo.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/ferivegupajo.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/86617048000.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/jabiriniwajadi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/861f00e661f2895a253d10a88106097b/41923348910.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_off0000b797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB797 11096 bytes
SHA-256: 006cf99101a4019d086fb2facd5262f2c11f7e96d9d4be563a5a23c7b6946681
font_01_sfnt_off0000d0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F3 16332 bytes
SHA-256: 55f2a05e987c114eea4d25ef25c29a460fcad4fbeb555ddcbb316d39ed0be1c9
font_02_sfnt_off0000faac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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