Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de62889393b2a9f…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 13:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9254b7723d12c0f373b8fa8af7860225 SHA-1: e96337a3f79608462ca51533b6ef927c4f1283ef SHA-256: 1de62889393b2a9f840eea14a32e174333d1760e2150c3dda3bc9d98aa1ce054
184 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links to external resources, many of which are hosted on compromised websites or disposable domains. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent to trick users into downloading further malicious content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://chromowane.com/userfiles/file/59700099545.pdf In PDF document text
    • https://sicurezzaips.it/uploads/file/zunaxixanu.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/mevuzepabazekibawesigot.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210905_050224.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/jomibedabubatuw.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/kujadodewesuzonugel.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a9b33a81f42d66ea530da7c585826e9/448543961.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/17029387106.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/96753371447.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/sexazajixulirixetosifizo.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/jalinel.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/95980431703.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/65369601062.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/pegeda.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/monede.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/nubumusigilata.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/82004086173.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/kezufe.pdfIn PDF document text
    • http://www.moyekolodin.com/files/luwedodi.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613508ac8309d---zisopovitenag.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/ed369f442be0e9890ff295fad150c301/tilukemaxudadagapake.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/2585517712.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/99073811071.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613702724dbcd---40268237849.pdfPDF link annotation
    • http://www.urbanwaterways.info/files/detaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=aa+gaya+hero+full+movie+download+720pPDF 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_off0000ceea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEA 11316 bytes
SHA-256: ce893641ea9fdf021df145d389043e1c1a65741f1d85f331f4b47f0824573601
font_01_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 17376 bytes
SHA-256: d7e763db8652d9bcb3e1e00a6bbf0b7a1a048751b8fb97c79259bea42920984d
font_02_sfnt_off00011640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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