Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ee06e9273fff6e…

MALICIOUS

PDF

91.2 KB Created: 2022-05-27 22:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 668522d8aec8c2a36d227404b9db3f10 SHA-1: 0aafb3f8afbea3ac6e5cdf47e0dba15096cf65ac SHA-256: 96ee06e9273fff6e14e81786dd5139b02a79b7ce893bc5c935d35b77efd97f04
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cafij.co.za/YmrXLWy8?keyword=juan%20tamariz%20mnemonica%20pdf%20download%20full%20text PDF link annotation
    • https://vida.posilatko.cz/files/wswg/file/94366636690.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/nugawuregitexuwoj.pdfIn PDF document text
    • http://lam.kiev.ua/kcfinder/upload/files/21089709706.pdfIn PDF document text
    • https://expomediainc.com/upload/file/99901988978.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/52581377931.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/77969806373.pdfIn PDF document text
    • https://lerizuxipojus.weebly.com/uploads/1/3/5/9/135973385/9916213.pdfIn PDF document text
    • http://saydersan.com/firma/files/kixojozajo.pdfIn PDF document text
    • https://gukivoxoloxuma.weebly.com/uploads/1/4/1/3/141300337/mofawabeker-nugogolife-lomor-livumitunujid.pdfIn PDF document text
    • https://guwasevotimonu.weebly.com/uploads/1/3/2/7/132741081/waguvis-pikefev.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/25191490152.pdfIn PDF document text
    • http://pflp-sy.org/assets/js/admin/ckeditor/kcfinder/upload/files/nadop.pdfIn PDF document text
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/xanulis.pdfIn PDF document text
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/559d3051fb2f.pdfIn PDF document text
    • https://xibupitosuxusi.weebly.com/uploads/1/3/1/3/131380094/kuloninazobofa.pdfIn PDF document text
    • https://dasateju.weebly.com/uploads/1/3/4/5/134582383/4149099.pdfIn PDF document text
    • https://belawutuvuzepim.weebly.com/uploads/1/3/4/6/134605506/02bd39ce.pdfIn PDF document text
    • https://pebufaso.weebly.com/uploads/1/3/5/4/135400671/ralipodutirivewami.pdfIn PDF document text
    • https://somusepuxe.weebly.com/uploads/1/3/1/0/131070447/b8ba17470f11f.pdfIn PDF document text
    • https://dujodorenenap.weebly.com/uploads/1/3/4/4/134488447/wagube.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_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 10952 bytes
SHA-256: bfda29430b024bf55906dc1a99bc498b361a5f39c968e9a89e7724f15f4ff2f6
font_02_sfnt_off00012f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F96 17856 bytes
SHA-256: ebea3c4f9d0594afecac84b43743da2e4f55326d36818c4ccb496439347639d3