Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a69ab26bd3cfc3…

MALICIOUS

PDF

91.5 KB Created: 2021-09-17 11:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6999c9ded5b745723132f7db5618b699 SHA-1: 8540a0704116f396dbb76bb2975b2e1e27084cd7 SHA-256: e7a69ab26bd3cfc3e9806e02de21e753de98378650695d2567d26aa26b3dce82
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=only+decent+people+movie PDF link annotation
    • http://fsanaq.com/upload/file/210905192611040752m7agyd3dig48.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/nivuvakaz.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/33811655423.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/mebasofazixewekasomanu.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/sufunu.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/1tc7s22n62jfe7l15mja6631s24srfar/20080404986.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/20619536095.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/67877026753.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/63418377442.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/tipope.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/55208435440.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2fb77809a---kagevuxanudebatigud.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613033267a3f4---39342267943.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/76003beb0779970bdd5be67a86e284fb/mugadi.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/48155588198.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/50477715959.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/82604abb42312f29a7c20157d3aadfea/53146876486.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/48247054805.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/diladevozafuna.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/90863186169.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/zinipir.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/6e0def9cf3dfbdec0b4d8e59d154c069/finimukerinagixop.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/limugito.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/83729204898.pdfIn PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090316544471.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210916195625.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_off0001042d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042D 17228 bytes
SHA-256: 4e6ecbe85584c859088a17af0dbe1657d4717df775a92ff022ea5f99052af11a
font_01_sfnt_off000130e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E9 10448 bytes
SHA-256: 945f51a737253deec40d149a0a8e099d77a78681586c6b4f92662b6d87eb772c
font_02_sfnt_off00014896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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