Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eab95c7e1b97e83…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 14:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 926a641d448faf6f610c8795007bb96d SHA-1: ecc5036cd45ff13dcd8179c670e6a59fca431a10 SHA-256: 2eab95c7e1b97e837a98bc362acc2d501da49e5d68d6899179c86e85525298f8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a likely phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document's structure as a link farm is a common tactic to obscure the ultimate destination of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://pet-fashion.ro/mm/file/54735416918.pdf In PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a69df3888bd68b7f227419ab2bc54bd/luputigixotedol.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b605b21d---xezesibubuxoviruxi.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/02a9284ad526e1d8d1e79619d39d52f6/nerarewaga.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858a3b7baeb---gusolaxino.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a9ef93839---32674844256.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/31079362616.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870cd684931---pufigawoxelilar.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/bamawofebawilezijuvuxox.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/6851658172.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/98618500091.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/q6v5g76d6uvncvh1hp93ugjgo4/kabixutofaratufodefa.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b14ad9153bd---67564105643.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/58195143958.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/43497972931.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/6cf40385f00840fa03dff907f1aaf9a5/13655391463.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8lj0lqu3gv13sa8tdmtnmu46c7/wolifaza.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/95481813826.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/afhsehs1rb34dfj76kp6spuo8c/37178666387.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b9f287cde5fc65601154564595b9fe5e/fubesonumebo.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e52f3544d699d8c492d6cc8a1d497cef/fegokixije.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160953ebeaf1e5---xadametifaxusozosodozuf.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b062768c937---warekifekapemewenuvana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=chef+quiz+answersPDF link annotation
    • 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_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 10468 bytes
SHA-256: 7767b01bd97ddb5165a42dc13113bd9fb1aa4a3cad2094251a964e5bdf7accac
font_02_sfnt_off00011d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3B 17180 bytes
SHA-256: a84dba58ffb63c302b06c51959f8365f851ffaa3a4d74d2c3619bc7e732364fc

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