Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff69555a790de67…

MALICIOUS

PDF

73.7 KB Created: 2021-05-18 03:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc0e5170cea196e3673d69ce1c99a37e SHA-1: d142f72d4d73737c0feaea3aeb9c8a45c38ba561 SHA-256: 2ff69555a790de67e5f7bba0427c51f381be5f174692c471e68a8f7b78b66c3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://allprintusa.com/admin/images/file/57260868381.pdf
    • http://dui-antidote.com/images/userfiles/file/76760302149.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607a99ae525b4---96730732521.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4395ead2a---sofebelerawipakesa.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608632203224e---teviseralugexo.pdf
    • http://altaprecision.com/userfiles/file/dusabedifagu.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/h0d94vdnmkgt29btq3uegglpg0/13785694501.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f128fbbcc6---89832243890.pdf
    • http://ekolojikweb.net/upld/userfiles/file/momezipikeviluzin.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-15/20210515090624915886.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083a8c0dbd34---60239956605.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091394a9f85a---kabojularurote.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/377664fc5e60c7985968682e60589448/69606443521.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e8d4c912---lolivit.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/e455af24abf30e2f7f8a299b8200ff24/dosix.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4f610e1644f1b402c1201220d0f7a7fd/fesibuxivodipanivo.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096cbfadeb5c---mifufufedepozugafopevireg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+binding+of+isaac+android+apk+2019
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15c.bin
60eb39ee37209a333e9d2ca9e93e097f8975f1508a56ee6c0197b60d1ada834e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 6020 bytes
font_01_sfnt_off0000f5d8.bin
90bdc2186408cd521e4dc45903eb0419253c379ed21ac6a8bde26a0a5b9720a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D8 10420 bytes

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