Malicious PDF — malware analysis report

Static analysis result for SHA-256 477d2ddd426491e9…

MALICIOUS

PDF

79.5 KB Created: 2021-09-02 23:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3df4fd6e5c349b57679fbafaaad7b5fb SHA-1: dc435815fb3839ecf804b06e9ece86a71ccd8670 SHA-256: 477d2ddd426491e9e8edbcb6422bead02864625d5171e9ca656b3a24a7dde3c4
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, several of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it's designed to lure users to malicious sites, potentially exploiting vulnerabilities or attempting social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • 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://tramtron.vn/uploads/files/files/8685686322.pdf In PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/4k38pnto869om0diuprp6j6n3t/93556560342.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1611888df9a9a8---96943459182.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/siziladuwizuwalomode.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/91360321109.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/25399761065.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/6551654ae6b1f0b2e39cdd2aa5da0c5a/45198278809.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///84098152236.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/retine.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3b3aaee70---jobunoboxizodomotew.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/wugesiruw.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/10908075734.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/gakoxa.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a049af8db86bdbf419d337c44c93b0d1/zodufuze.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/kugivonake.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160813cf55d2d4---nodugolopup.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/lewesudixedidujekonal.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/u58aurm9cfgc7gphbld7u4v7mh/rabivepewotitaboj.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/7dc5c912f41a11e440df1946f014d83c/97084001971.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/nemolebogogimopotofixixa.pdfIn PDF document text
    • https://pindimana.in/uploads/file/17173208557.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/famowiduwonoxa.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/sisefonolifi.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/126b41d8b5d12ff9d0bff73a7c34a691/gozipujevomuviwupix.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/15245116001.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/78295558801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=modals+of+possibility+and+probability+exercises+pdfPDF 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_off0000cdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAE 18972 bytes
SHA-256: b63c00c946cced76d0f6bddaf2fb19929cfa75c9478d19ea33968d0b4efe73b2
font_01_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 10960 bytes
SHA-256: 762500007b96568f50af5cb488e57aef63ef5f716c1ea0abe86209f4535fa1b4

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