Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e70205b82efcbbe…

MALICIOUS

PDF

87.1 KB Created: 2021-06-26 03:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d223fa4d4faddf0e4297483cebf74779 SHA-1: 966ecdf01f264a90f06294c5988f373e3235fb7b SHA-256: 5e70205b82efcbbea3dc96fcac471c570c0e1bd744ba8fbc9e9a831ba6b34509
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to potentially compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using such sites to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/53688919655.pdf In PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/71e2d3fef50cd8957652f536f28f8916/pujulidosezasufolarot.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607908d083ee8---fanujupe.pdfIn PDF document text
    • http://rld-carbon.ru/file/36446385470.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ca7bf3873---sigaxanipadedo.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607f48a3de698---xadadajesisakifuranusofek.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/kerebigibepobujilusa.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f3629dcf2f8161a388c832b49e648700/sixedijodofopitobebujufek.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/53913342138.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/0bd4e1f4875724eb23f776e7fa1e305e/45827698291.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba036a581---12258482084.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c57dceb0a28---74305919416.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f5f6b3a8---joporusuwidodexen.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/voxafaribowujuronetinivop.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774655badb9---48907864492.pdfIn PDF document text
    • http://haai.org/upload/file/nanosofobovojipumagin.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/f56dnqtnhkalef907ul1g17u59/80018508104.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/d13af6eb5c61c03284537e0a28f1328d/tovesonagugibije.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c3004d6106b2afbbdb07e11c0e215dc4/resanutipusejabol.pdfIn PDF document text
    • https://masihpt1.com/contents//files/lixexibenawirususi.pdfIn PDF document text
    • http://wenxuezj.com/images/File/88769624102.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071047d7b459---15052651377.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b337aab7738---bimiwibosob.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062301061873499.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/699bb7ec5b57d13913f5e79cbde62666/33905291015.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/851ced190e08f9dad2fb79e9a98dd1b8/mebexewutejakar.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/85690761374.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=extract+javascript+from+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_off0000f263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 16932 bytes
SHA-256: 65b05412b8cfa1f679d3d8b502330bd55eaceb38eeaaece6cb69daa565e4e06b
font_01_sfnt_off00011e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E20 10780 bytes
SHA-256: f1d4a1ee7cf1c8a9b7a98b8c1a29cb73a3eccdd1a580cfc9231e25b45df3d41e
font_02_sfnt_off000136f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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