Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecde5cedb064430d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-24 11:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 463bb3b78cd9c749c715eb8b6a7d6577 SHA-1: 560470ae67178e7e84b703d314cab3435c516816 SHA-256: ecde5cedb064430d3990114b52c8680d999e6dfa864f4b42c6b9be75da4515c5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm, suggesting a phishing or spam campaign. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, which are often used to host further stages of an attack or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5582

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/95253654d033274f2b987f1e51508bf6/97460279347.pdf In PDF document text
    • http://kahasat.cz/data/file/76203991663.pdfIn PDF document text
    • http://theponghop.com/upload/files/gutef.pdfIn PDF document text
    • http://keitbg.com/images/files/nafezipitoxo.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/finebizawazima.pdfIn PDF document text
    • https://mimpishio.com/contents/files/76517456734.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/65338779958.pdfIn PDF document text
    • http://annabarons.lv/files/files/51907361242.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/jotozikatobus.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gakom.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/zasakexitomibekimi.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/80116444092.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/73162606629.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/pijokanupedil.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/74377489695.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/40340002221.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/genotureguxasonidabek.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/54733508337.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb82512a90---tajesotolilozile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=game+of+thrones+season+8+episode+3+putlockerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 11496 bytes
SHA-256: fd911f090ff2b871dc91bd6ea48a889ff4297e408fedb6ffdea766ecb7f9f787
font_01_sfnt_off000123bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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