Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebc528416816acd…

MALICIOUS

PDF

154.6 KB Created: 2022-05-29 07:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: e9745a63732b7f715ec9fcd1c452be30 SHA-1: 420e5d027cfe26635aee03ed496bc33ed2418fb3 SHA-256: 8ebc528416816acd815bd818f46808394ed9dbff7e06e100a8b53cc887f4940a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. Multiple heuristics indicate the presence of link farms and compromised CMS uploads, suggesting an attempt to obscure the true destination. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8194

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lazav.co.za/XSRYdR1H?utm_term=escala+de+daniels+modificada+fuerza+muscular+pdf+download+pdf+gratuit PDF link annotation
    • https://dujaporugegebo.weebly.com/uploads/1/3/4/3/134314108/mimesebojixazix_wamaximunodopu_nofasige.pdfIn PDF document text
    • https://xizenebijebis.weebly.com/uploads/1/3/2/3/132303300/68c17ecc6c322.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/bifafi.pdfIn PDF document text
    • https://xenewonunawof.weebly.com/uploads/1/3/2/7/132740417/8177650.pdfIn PDF document text
    • https://faxefijuw.weebly.com/uploads/1/3/1/8/131872096/198546.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/52232764612.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/penejesezekon.pdfIn PDF document text
    • http://kama-msm.ru/storages/file/94592206973.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/nowad_kuwevusudaj_pedosivu_zinaz.pdfIn PDF document text
    • https://gagasanriau.com/a450d92cb6be01b3b3669c18bfca7901/kcfinder/upload/files/6086229294.pdfIn PDF document text
    • https://kingsnews.org/app/webroot/js/image/files/17368942431.pdfIn PDF document text
    • https://gazisaki.weebly.com/uploads/1/3/4/3/134371182/vupenofu.pdfIn PDF document text
    • https://sivowudu.weebly.com/uploads/1/3/7/5/137513174/jaxavifom.pdfIn PDF document text
    • https://zagi.hr/files/waboladavetud.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/xakapo.pdfIn PDF document text
    • https://fufudexun.weebly.com/uploads/1/3/5/3/135317209/lopibogumeb_xuket_jokubevuvaj.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fc552d90e62---lufadesipunijuxure.pdfIn PDF document text
    • https://miwebuzoz.weebly.com/uploads/1/3/4/0/134095964/dobizizigunojidol.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bfdbbed11d88a3e548b46213a0867bdd/1666208497.pdfIn PDF document text
    • http://wmasgroup.com/userfiles/file/94744598612.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/97795777488.pdfIn PDF document text
    • https://xigoduturiza.weebly.com/uploads/1/4/1/6/141681630/pusarodim_potufilu_sorevosu.pdfIn PDF document text
    • http://ggbris.com/slbdavbatala/userfiles/file/nupumupasag.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/vegixekele.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/sajisag.pdfIn PDF document text
    • https://fusavufotopos.weebly.com/uploads/1/3/4/6/134634064/sekaxilaru_kixamage_duxeputifopewem.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1627bc3c0e0ef1---87254576987.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/59806251349.pdfIn PDF document text
    • 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_off0001fa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21237 17320 bytes
SHA-256: b8d7ecf9afd90921b3f4d2606e0d5874c1b09d6bf95bcb0a889357ce16f55b93
font_02_sfnt_off00023e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E3A 11192 bytes
SHA-256: 9d59be748fc56543bcb8ad478b461715f999381157864d1fb1082e8db7ea65d9