Malicious PDF — malware analysis report

Static analysis result for SHA-256 93426631eb01cd49…

MALICIOUS

PDF

54.2 KB Created: 2021-05-11 23:44:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7048065ac5a1b3d8681c6641a047bbd8 SHA-1: e5ce71d7835810478255138896b113da1c65db29 SHA-256: 93426631eb01cd496a44a416c2d4fe5a6a8935995b4a26ddb2c53a8064877544
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document employs social engineering lures, including a fake download button and a remote support tool pretext, to trick users into executing malicious content. The document links to external URLs that appear to offer game hacks or generators, suggesting a likely intent to download and execute a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8795

Heuristics 7

  • PDF links to a 'free generator / game hack' redirector high 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • 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://netcdn.xyz/app/479516143/do-you-get-windows-10-minecraft-for-free-with-java-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C5C 25648 bytes
SHA-256: f4c8554ebffdd61c59d08499d98b957cdf4dadb3530f004bfdea95944e2d942a
font_01_sfnt_off00008657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8657 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off00009f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F81 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000ae0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0E 19440 bytes
SHA-256: 4f6116c3ae1f04b8b6121a0b0d1b9b447449cf69c412c2009f2ae6d1f9a529b7

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