Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14566b773f3b572…

MALICIOUS

PDF

84.7 KB Created: 2021-09-07 12:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7a2a1dad70d72d181bc158517e9d2b5 SHA-1: 0a0ac06e657fc9ac8cd4709c567cfcb13e35b52a SHA-256: e14566b773f3b5727d9e91210aa630784a5c2873ce8eddccd0fef44703ec6b98
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The primary goal appears to be to lure users to potentially malicious content or phishing sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://vkts.se/userfiles/file/zokugakiba.pdf In PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/74671638825.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/kofepegowapite.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/95bce8f2cd5306e12e39858ddac52872/28581200070.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/6810354955.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e6c454b88d5ecdf89b263ac251d59de7/kelepakuviwevokofu.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16126e6525d7d9---40739163219.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/dijugimasuzidogaganod.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/fujenozotetujanibiveko.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/85d2f0ee3c85da79de3261f5b1b89e9f/wulebezixijevino.pdfIn PDF document text
    • https://mmtours.si/uploads/kirikabum.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/kakutukivemifabonode.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c900c4fa37---pirelopokeku.pdfIn PDF document text
    • http://ruresept.ru/files/file/42074639608.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d1a1b8294---fajonipalopepadumidapisel.pdfIn PDF document text
    • https://medtek.vn/storage/file/77707715154.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/blkrprtaii2meol7b1bv52i5i3/24056614141.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/lobimuro.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/21511467116.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a7cc5ce51197140814baa730f4a40613/minutelonejinas.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/vebajelazewire.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/86649744427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=nombres+de+medicamentos+genericos+y+comerciales+pdfPDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/66697098306.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_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 11196 bytes
SHA-256: cf6c18b5a9a47cc2cc1adf785b65edca31cfb7f0b05af4a5f49c738b8a8d3ed8
font_02_sfnt_off0001152b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152B 18660 bytes
SHA-256: fcfff73dbe06015a624dd2f8ac10357b879e31c73d85463232d8fa889e83f103

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