Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b770d7a90901798…

MALICIOUS

PDF

73.2 KB Created: 2021-05-22 04:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00459dacac230d5a56651c5cc86d4e28 SHA-1: 324753b36da4c424fd45f723177cb7a1d0dae5b1 SHA-256: 7b770d7a90901798fcce7a77e0fa583220f591d21d346f9a89d77cab373bcef3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to PDF files hosted on potentially compromised websites, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format itself can embed malicious JavaScript, which is often used to download further payloads or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/d4031da28ad4ee488a808853c14a38dc/jobuwawuvujewaw.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080dcb4e9e2c---35823985199.pdf
    • https://pathakpharma.in/singhania/downloads/file/dumogusam.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaf2349ede---novejudik.pdf
    • http://banghaija.com/userfiles/file/lekezaropitoke.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0acbeb15---37310025504.pdf
    • https://alnahamgroup.com/userfiles/file/64060082460.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078ef5ae0e2a---japeraxod.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8454ca3e---gusalurel.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609e63be95d39---40234205292.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/qgl3ki8qu3riq617oodmdhr4n0/zuwiroritibasamof.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c33e6b2d43---71670015868.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/1566ccl971jrhnsk7iu9jmsg2g/38465932711.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928e677e65d---21533092950.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071aba865dba---48784962975.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58d10dfd2---9788080519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=gastrografin+enema+coding+2019
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df02.bin
8ab64ccf87f91414184781ad18938c5cef7f9167c8e733a01b2a922261b12610		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 5824 bytes
font_01_sfnt_off0000f2c5.bin
609737940873710ea3c15ec7ab591249bd21b7ecf5e613a49d8a186612679db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 10920 bytes

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