Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ae15897b93badb…

MALICIOUS

PDF

78.8 KB Created: 2021-06-20 02:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c2bf2e983e54fed4fccb0c59003aace SHA-1: 6a946443f24f39f426c64fba562f00125e861888 SHA-256: 97ae15897b93badbe3ceb931b8cc439d3d797d52a82c2054c732301d8cee74d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links and disposable hosting further supports this assessment.

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 https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14ef88fba3---zesegokifunu.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/t3lkkdq55b9is0bqulnqc9cnn4/majotujagefim.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b5c63ad9bd5f4204373d0957e93431b4/73055373004.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ka71f9mscp4jncgcc46jvo8mr6/nimodusogidumed.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ddcnfb34n5gbe3ocjq1f71e3ln/37943049897.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/duth7ji5i128brk7v589q44ej4/nixasivedawurirapipapebuv.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c85c64724be---fivumaxegenoparuje.pdf
    • http://resetimpianti.it/reset/public/file/19034754781.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b747335e319---37395317961.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/nijazuranamoj.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/povanisimelozikezuf.pdf
    • https://allmassage.net/upload/file/20210515215243.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/472f11dd9f48e673b2acb40b2c005416/69024515646.pdf
    • http://greenbrier101.com/userimages/zokepawu.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0a5b999e---35315595236.pdf
    • http://mousike.it/img_ins/files/nadosodurodabuvogalobipik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=all+amiibo+bins
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e830.bin
41256332a43d4664d7cb985e8d216d7b432eaabcc71b223d81034e7e42f7ade0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 4452 bytes
font_01_sfnt_off0000f717.bin
bbee270c1db81724ca80f258ebf14ca21f2cf38863dd2105387796bae65a34f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 11624 bytes
font_02_sfnt_off00011edc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDC 4324 bytes

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