Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fd93d96e7b88bb…

MALICIOUS

PDF

89.7 KB Created: 2021-08-13 13:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ad629071e3ce25b10094090e777dde83 SHA-1: c181b168d842699136d7d27227d55685c2b1303c SHA-256: 68fd93d96e7b88bb6f8273861227c0fca86d0b807fd705acb9c60c6918aa9cf7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of a credential harvesting lure, specifically targeting multi-factor authentication or one-time codes. The document contains numerous links to external PDF files hosted on various domains, many of which appear to be compromised or disposable, suggesting a link farm designed to obscure the ultimate destination. While no scripts were directly extracted, the ML classifier and specific heuristic firings strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://observatoire-omic.org/documents/file/92738446736.pdf In PDF document text
    • http://buddhavehicle.com/userfiles/file/5141760976.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3a115e783---59984785742.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a309a7272b1---zujimosowojugexoxebine.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/sevanevobimujelenofuk.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/79089c0c33758eea1340ad3222efc345/74050466888.pdfIn PDF document text
    • http://mobilenmr.com/files/files/pefelufurepenojawewu.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/96511026499.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/bebafatowowi.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a42f3e550ca---temotiz.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/21617112724.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/nizolukugi.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/33475660603.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55f48c3b6---61627555673.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080225d98e77---98007138616.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/78015173572.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eecae14ce---29888990140.pdfIn PDF document text
    • http://superazs.ru/images/news/file/81857338084.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/43491882236.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/jubowidumabinowejulinas.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b14197eb9---20252111359.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/6153488064.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d10516471---rijekugobisosiritojexepe.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/35264118813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=afk+arena+codes+2020+februaryPDF 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_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 17004 bytes
SHA-256: c6446c38c18b9675675b04693226f41776ce2596b254ce572e378da24380b8dc
font_01_sfnt_off0001275c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275C 10904 bytes
SHA-256: c823287ee186e1b1edaef830e61db8743da94bc4eba0a3bb303d3d5d8fcde65e
font_02_sfnt_off000140d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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