Malicious PDF — malware analysis report

Static analysis result for SHA-256 e700c27c71ee18f6…

MALICIOUS

PDF

89.7 KB Created: 2021-08-08 14:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 306d3f8b8aabb649a217578c884b4443 SHA-1: 744c38bfd11eb552c77b97707332240818aba1be SHA-256: e700c27c71ee18f63e0e257b5a74ac9e1f5566769e8c548208dd6d1b30e70a10
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, a common tactic for distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of multiple PDF_URI heuristics and the ML_NYX_PDF_MALICIOUS firing support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cellesekorea.com/ckupload/files/xikiva.pdf In PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/db0580c883e2a6860b6291471c2e79bc/xupogulapikatomakunaf.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/aba64001ac450595e5e254752d650401/popat.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/61977d65be157f1e784a36409c71d72f/20004610075.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/bde7aa49bb048420a0c9d3b99b24aca5/43031746777.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/52583906998.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210609063345834369.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9294bad9e---saxosodakunexupam.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/siwamanujowojitu.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/74319548595.pdfIn PDF document text
    • https://asi-filter.pl/files/file/254868339.pdfIn PDF document text
    • https://andana.us/files/files/domafunata.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c15e22d11---46702921345.pdfIn PDF document text
    • https://digireg.cz/upload/lubumazokop.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/xubunitebepotadexijumok.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/nitapupod.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/30661320825.pdfPDF link annotation
    • https://cqc-material.com/app/webroot/userfiles/files/12909032110.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/70436574763.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/22382112494.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/5288b0251ba2ddd3325e950020282b8a/54188113610.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/mepokosuzuleviwifuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=descargar+five+nights+in+anime+2+para+androidPDF 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_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 16656 bytes
SHA-256: b805aefa9a153f09b2315c1b1fda186cda87a164562493c28986f57a55f009ff
font_01_sfnt_off00012570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D87 11208 bytes
SHA-256: 75156021b13e506f31846113cbb44e425896f67afc915ab1ab7ff6a529c0b8eb

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