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
172 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link T1566.002 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, including a 'link farm' heuristic, suggests the document is designed to redirect users to malicious sites or download further payloads. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • https://vida.posilatko.cz/files/wswg/file/94366636690.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/nugawuregitexuwoj.pdf
    • http://lam.kiev.ua/kcfinder/upload/files/21089709706.pdf
    • https://expomediainc.com/upload/file/99901988978.pdf
    • https://chief-moving.com/editor_upload/file/52581377931.pdf
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/77969806373.pdf
    • https://lerizuxipojus.weebly.com/uploads/1/3/5/9/135973385/9916213.pdf
    • http://saydersan.com/firma/files/kixojozajo.pdf
    • https://gukivoxoloxuma.weebly.com/uploads/1/4/1/3/141300337/mofawabeker-nugogolife-lomor-livumitunujid.pdf
    • https://guwasevotimonu.weebly.com/uploads/1/3/2/7/132741081/waguvis-pikefev.pdf
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/25191490152.pdf
    • http://pflp-sy.org/assets/js/admin/ckeditor/kcfinder/upload/files/nadop.pdf
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/xanulis.pdf
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/559d3051fb2f.pdf
    • https://xibupitosuxusi.weebly.com/uploads/1/3/1/3/131380094/kuloninazobofa.pdf
    • https://dasateju.weebly.com/uploads/1/3/4/5/134582383/4149099.pdf
    • https://belawutuvuzepim.weebly.com/uploads/1/3/4/6/134605506/02bd39ce.pdf
    • https://pebufaso.weebly.com/uploads/1/3/5/4/135400671/ralipodutirivewami.pdf
    • https://somusepuxe.weebly.com/uploads/1/3/1/0/131070447/b8ba17470f11f.pdf
    • https://dujodorenenap.weebly.com/uploads/1/3/4/4/134488447/wagube.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe0e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 16792 bytes
font_01_sfnt_off00011625.bin
bfda29430b024bf55906dc1a99bc498b361a5f39c968e9a89e7724f15f4ff2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 10952 bytes
font_02_sfnt_off00012f96.bin
ebea3c4f9d0594afecac84b43743da2e4f55326d36818c4ccb496439347639d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F96 17856 bytes

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