Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4de7ccaa088ffda…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 22:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6f936b130656bf27f4c9c68bd19a50d7 SHA-1: daab8783b20240926cd2e09a078f2d45ac3f3b67 SHA-256: a4de7ccaa088ffda05ea1ceadb72cee09479c72cbbe4bdc2ef2a65988feb3370
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised CMS upload storage, suggesting it's part of a phishing campaign. The presence of invoice-related language further supports the lure of a payment scam. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081559d65e3f---28966365209.pdf In PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0ee18e5ec3f52a0beee51b3822ab9880/funoze.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/63575107469.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/84667615691.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/lojezetujigudofijages.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6e64b9ad3---64219057701.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/pidukupigasomogakigefox.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/fagadatila.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b9b14074bd66663ab9b9fcb4a1102b7c/bemagij.pdfIn PDF document text
    • http://mosjob.ru/images/file/satupek.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/zuxiregosefil.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f015bab6d6b---dufodadika.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/wixosebazi.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/kuxulanonirijotovuvepo.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/88272432266.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/42984184253.pdfIn PDF document text
    • https://kar360.com/resimler/files/ratewizevin.pdfIn PDF document text
    • http://boxethai38.com/upload/file/xukorovolixopeta.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b36e8f245---21118580206.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/62555618226.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/68273890311.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/89201597654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ethics+morals+and+values+in+education+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_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 16940 bytes
SHA-256: 14266b8b289e194ec4c662799b9d52cd981a7a84518d1f89f63da00a22ba8c9f
font_01_sfnt_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E4 11036 bytes
SHA-256: c2547deda7323de36bfce9647ebef9c49fddf765be4bbea48de574b51e952927

Open this report in the interactive analyzer, or submit your own file for analysis.