Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e080efa4189233f…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 10:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a80f29c38ec5011eb9603ba17bbb50d8 SHA-1: dc46fd2cc6e4d57d83acd66f33e2a4888a5d035a SHA-256: 9e080efa4189233f01c974159c4e91efbf7acd97e416f245f58792d8ac10df3f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting domains. The primary purpose appears to be directing users to external sites, which could be for phishing, credential harvesting, or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://chulintemple.house-well.com/CKEdit/upload/files/62576224503.pdf In PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160942b4b25667---49132361991.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/28940459160ae713fcf879.pdfIn PDF document text
    • http://qa-whg.net/upload/files/levirodegow.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/gabumezusefo.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/986aaf079c693b5e2e7652cd3a5d5b0c/natetasujafukakepujanizi.pdfIn PDF document text
    • https://gilbertems.com/videos/file/fezogivem.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/70641147377.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/84656543956.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/xisurat.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/11979505793.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03eefd2d77---95458489989.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/vanozasiduwavevoxunap.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/zujiputopaguboj.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/21825586790.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/dd7b75b17ca6f7a2425453116c25fa0a/sejagirezasoz.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16119674b9f0ed---lutiniwezuvugitijizewidam.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/sovosinapadepekifomojo.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9018bc91d1bfa283afe4a6cae8f2f93a/59135105504.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/87915279640.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/66808047010.pdfIn PDF document text
    • http://coffee33.ru/archive/file/52202971669.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/5454225895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+to+do+with+an+ink+sac+in+minecraftPDF 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_off0000df47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF47 17956 bytes
SHA-256: cba09c76195fc01d7121fc1b717dd279a957ca6437fc9a15665fd4e6a8b9b91c
font_01_sfnt_off00010deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEB 10868 bytes
SHA-256: 3475883823969874780c9fa8b0eb6c2d14fdc48fbc57f296633d6b9ef9a16b48
font_02_sfnt_off000126f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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