Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d2644d60a7b603…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 20:11:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: da2c4ede37f1041dffd3b89aeab8639f SHA-1: 49cdcf448cddcc6fd16e68dd8b1ece6a9c02b711 SHA-256: e3d2644d60a7b6038b9dcf06fb78708877a87c9de001a8a8e09c637c084d9e8b
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'Robux Free Gift Card' and 'game hack' lures. The presence of a download button lure and the ML classifier's high confidence score further support the malicious nature of this document. The primary goal appears to be directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.tw/app/431946152/robux-free-gift-card-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-money-in-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/sites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-clothes-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-roblox-11-14-16_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-how-to-sell-t-shirts-for-free-reddit_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacks-for-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/unlimited-robux-hack-no-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/what-is-the-free-robux-code_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-2021-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/box-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-into-the-big-brother-house-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-202100_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A40 22480 bytes
SHA-256: a13c157da23be790fdffbedeee6a0e7e914d0b249270482d34c581f68c69247e
font_01_sfnt_off00005c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C39 19112 bytes
SHA-256: 9469897dff8cab28ffda57ea4fb04243aaf5b849cb1d333b453ecf02c9debdd7

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