Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafcc94010c1a861…

MALICIOUS

PDF

94.1 KB Created: 2021-06-16 04:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dd3edf8b8cf4701259ffb06e6ac40233 SHA-1: 2d2aa80444bd485a702883e498c7db19de7549cd SHA-256: eafcc94010c1a86169290d560cd9201ce3035d544b953a69da4bd2424bb69ffd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=release+date+of+jurassic+world+fallen+kingdom PDF link annotation
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b04ba2bc6b---56431577268.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/61387985488.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858adb6a283---49578436642.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6adb646fa4171c74815e6f8ffcc50735/bedukemoperavapire.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/zafofifebunawenuzodifomo.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3a9a9f8eb4a696f4002e5a33dcc51992/keguzamupiwebi.pdfIn PDF document text
    • http://accronline.com/userfiles/file/68522753092.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/12f8c30c7883d6b393ad7efc8e894819/13318793721.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915a6165c4a---47520940083.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/winosaruropozigimogazerot.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2944d6f01253c9852b44c894c6046446/11390646824.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/feluki.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/82205426308.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/ritukodukag.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/zokajebonexopozerevomaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC0 5580 bytes
SHA-256: e4d3460d07e54c9ce4c8c6095f2312b3d7259c486e2c77b1abf7d8b9d7467e5f
font_01_sfnt_off000141c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C8 12368 bytes
SHA-256: f9358c2b6b7f55cb068756a3ec8ccb7eda19e5fbfd7b62f835af01ea43fc6cfd

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