Malicious PDF — malware analysis report

Static analysis result for SHA-256 7730ac193fb5a118…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 08:11:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 84545c5c4ef958922e6bd535bc389bb8 SHA-1: dea4190980a996b9e9cb1b8fa061134b3443f277 SHA-256: 7730ac193fb5a11809b557c4415c622a09bfd0b5397586b6ed8a666abaa1b01e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The document body and embedded URLs strongly suggest a social engineering lure to trick users into downloading further malicious content. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-2021-hack-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-items-on-catalog_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-tablet_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacking-ryrylol3-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-survive-the-disasters_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-no-human-verification-2021-mobile_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-roblox-2021_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_off00003093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3093 22232 bytes
SHA-256: cdf3e897b3c5430fe026f6e31dd57c9246cb9af8ccd67e232e3407022bfcc2ca
font_01_sfnt_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 19056 bytes
SHA-256: d12ed7f60ab6f0ee9203b204c43922ef7388aa7296366b2a65af9fb0b247c164

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