Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abdf9939e64ee7c…

MALICIOUS

PDF

83.8 KB Created: 2021-07-14 09:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3978791a01bc153f8255c5fa7746c8a0 SHA-1: 5128b0e499ca5e209df286dbca81fe2fae38ebd7 SHA-256: 7abdf9939e64ee7cab5e0b656eacda5c605f8d6dcea6464ea9e1895632d5c054
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute phishing content or malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/71289294441.pdf In PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/ff3a3312e717f2e5de6419f87ad3727c/72075750569.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c06565a40d1---burejidewibisobolupale.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/26338285004.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abbbd350f94---mezizifunowitipa.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/nebilexegosazuzelinenewav.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/95834605653.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/10195250549.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/d9911835652ec4c5957528b7f418267c/76600302469.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/segikaperid.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5ec52536---95235426885.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1094c2fa18f29242f6df3c376e75402c/3385094533.pdfIn PDF document text
    • https://susta.vn/userfiles/file/51423830783.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/66225368399.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b17207848a5---55532248568.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6e2014d7a---59855794565.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae749f5214d---sibojurugunetazudibaleja.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbea47eae1---52443098170.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/ooi5dgu007utjt0dk8gcou1a25/xuzalogifuzoliwu.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841661283a6---tenof.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3f3c7d1cd---jikesekuzudewatole.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/m2lvl7r3i7sk46u6e9b995lofv/70280432477.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083fce2113eb---tezero.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bb4e93940---xitesuzotejifofejemosibur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=best+grit+to+remove+paintPDF 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_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 16820 bytes
SHA-256: 24893ab831a79b9b2cb66a626ef7260cf4e551698bed55425c1ac638a3d8ca89
font_01_sfnt_off0001116d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12984 10668 bytes
SHA-256: 2ddfe5b9a44b47dd4c52ac6fd436b580bbe769d258a1efd3e74e7c8db56cd810

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