Malicious PDF — malware analysis report

Static analysis result for SHA-256 e006173adae10fc2…

MALICIOUS

PDF

88.7 KB Created: 2021-07-20 07:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3816f69e3f736755c2c62c5a8b046aab SHA-1: a2c3af0b3e2199821507b8b6f2976e5fde256fa4 SHA-256: e006173adae10fc2654081f08c6a671fe195fa2b599df5e535e783557a2514ce
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, but the link farm structure is sufficient evidence of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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://sabagdasarov.ru/upload/file/70350892686.pdf In PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/8f4ecdf62df1ec8b24619b99725932ee/puvoketeviwawur.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/bb48b853c4de4d14a817468e99835376/81384776949.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/27503d4a3d41d370ff1153219cd3561a/23491998163.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/korojux.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5e7d70206---72238187225.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b07f0b184---44184974147.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/zetidesokaruwafaluxewusep.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160824816834b3---lusuna.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/28323612581.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/244d07a36b54b024a606355798ea30d9/mawizirod.pdfIn PDF document text
    • http://bryanhigh78.com/clients/72554/File/rusubinosekoba.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/movonejirede.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/sl7kpnu9mc37tm1iku036pmd30/97484658247.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/1c1ae2f9ac34d3e01f81496e60708975/ragofamerabez.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a2481d8b---63809181930.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/75818866598.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/17371566257.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/tujozofijewimuji.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160832cf0a9bd6---kifepegulam.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec9928feb2---13831234322.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210707145920.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a601b75896---desut.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077965162dda---sogofogamupuwegilaloriku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sudhakar+and+shyam+mohan+circuits+and+networks+pdfPDF 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_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 11304 bytes
SHA-256: c3dd822772b97401f2de3e21d3a3678d9c5c11c574101ddfb1f05f7f3cb313c6
font_02_sfnt_off000124c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C1 17888 bytes
SHA-256: 97753e00bdfc653d78bf7b5e6935a6a50a79940c4d7d2b5d4d32aecf8a26df86

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