Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c881c865f8dd1c0…

MALICIOUS

PDF

77.4 KB Created: 2021-07-08 19:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5fdf067aa64013502f8db9508347bebd SHA-1: c1f9cae56ae3748c7670cf882529785310a822c1 SHA-256: 9c881c865f8dd1c03346db91ce910e47f330393ada72c154e86dd005de49861b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which are hosted on compromised CMS platforms or use disposable hosting, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports a malicious intent. The embedded URLs, such as the one pointing to 'harry+potter+movie+download+in+tamil', indicate a lure to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://crewmak.ru/uplcv?utm_term=harry+potter+movie+download+in+tamil PDF link annotation
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/74c34f23ee70241219c7f8750849397a/79253593094.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/84389599959.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/jigezerotu.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/gimokobuwo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bd6d9ea07---tilopep.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c875ac41fcefbd070e1f73801b381d56/gubikorivonexerikij.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091a385cc96b---44211529920.pdfIn PDF document text
    • http://itfind.ru/uploads/file/30254001093.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ac6679b02---41105327835.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/0f5e7c3buorkklei45fbr0v52b/bowagal.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210622205316369.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f284cd112---mazapadabo.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/rimukudigis.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9cb6b021ea2f1aaa469adfd31a38943d/xokomufoluwidewegegitik.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c34d41537b31558c20343453744e0319/xudapaf.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/0f5c2ea7b5d34e9bc27cbe6265eea89c/62908353503.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1258922755bc335b1485ddbac9f144ca/39528768405.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b348753a2---66220486771.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/zajutoxonexexalom.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/94k2mseeho4qenu1ngg32k48de/74847100354.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e10ea74acd8---67332320731.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30be089b39---vilorelup.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/86885200080.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0e9deb85c---15306750556.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_off0000ca86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 17564 bytes
SHA-256: 5fda98398f89265982fec9a184c1ff3d0a349b3bcc6fd3981fa3453aafd1a2f3
font_02_sfnt_off00010ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFE 10640 bytes
SHA-256: 56f502f3eb95ad7a96e3650b4c6d7072c3e3e87f02dc6d8d1c29f44bd60e156f

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