Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d5dce49a4e81c2…

MALICIOUS

PDF

81.6 KB Created: 2021-09-10 19:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 021663338b624fbebba4a9df4ab33854 SHA-1: c3ea0738073bcd03e5b5eaad60eeafec47d6b8d1 SHA-256: 30d5dce49a4e81c2b6d5cea0de73da6c80fa90db0ff1b06c1345753e5ddebc68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed for phishing or malware distribution. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=android+lock+screen+bypass+tool PDF link annotation
    • https://medarbindia.org/ckfinder/userfiles/files/42011226382.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/kakuzomekejebunixugup.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/33498211256.pdfIn PDF document text
    • https://path.mn/userfiles/files/33904351479.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/69433828615.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/67356013994.pdfIn PDF document text
    • http://caythuocnam.org/images/files/25848934850.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb43db6a65---pekela.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0902/99db3d7d51aaf8469a487a9d20e15afe.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/2ce851bcb42859356f4118b44bdbadfd/kogotelibodejewitagimolab.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/gezoduzujuwefufolugubovi.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136dd3dab140---rewolagakunez.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/51804360350.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/23994202671.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/30030732095.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/60570977790.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/21903338166.pdfIn PDF document text
    • http://rotang.net/userfiles/file/56007741.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/mogegawotoponu.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96589599385.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/lf389ac695m335ei2et3kodbu1/67206325897.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab9f74689e---87487211506.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_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 10836 bytes
SHA-256: e74290f882ee6e919ae197c2d9d8ac7faa81a71e7495b9d4288dfff78e48c78d
font_02_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 17900 bytes
SHA-256: d50537cfedc8d8c8c52425e0da8543a1a9e7c4fc7db304031c46a0dc490cf757

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