Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab4d20f5fa77d9…

MALICIOUS

PDF

93.7 KB Created: 2021-08-03 22:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5671c480b27dd8d1f7709e1ebdabdf69 SHA-1: 66584e89cbc2d12a3826ba8bf527a8c955ddda02 SHA-256: fcab4d20f5fa77d9d37224e85e217d86505820af32890a066be4ab56f7aae8ec
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/1076663750.pdf In PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160776e3878e1e---detitelemi.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/95778804396.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbab2b273c1---20223981420.pdfIn PDF document text
    • https://fototipia.hu/files/files/58262550277.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/8e1e0507f27419b2ca71d7a5f6416184/fifapunixone.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8fa609cb---23203584678.pdfIn PDF document text
    • https://marigabung.com/contents//files/8747391928.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/giterajurasak.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/45085554125.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/201dffb60d4cee5d1df53435e4fd6f50/42426735339.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/15177474365.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c58fca2b543---zalidomosaxusarobexeta.pdfIn PDF document text
    • https://topupdana.com/contents//files/60301515762.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/kupiguburulopedegopozu.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/78198950174.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7311d8f5ad---80636015918.pdfIn PDF document text
    • http://shosholoza.de/file/50905729769.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/nowaxakafekuvawime.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/pajotenasurolux.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/zivozifibarexifumifumar.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a642bb07---43111233844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+beaks+of+finches+student+laboratory+packet+answer+keyPDF 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_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 17908 bytes
SHA-256: 74aab3396a5994b9437ef5ad15e7243edec53e5c9c9346d0397820f5931c7b39
font_01_sfnt_off000135b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B6 11212 bytes
SHA-256: baf98f5d3bf33796a043dbc517bda70c8d651182b9b0f59bb5127a760f4137ae
font_02_sfnt_off00014fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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