Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa250c70168e01ca…

MALICIOUS

PDF

31.9 KB Created: 2021-07-04 21:12:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 42e84bbba7e5dde3ff6f5a7419604389 SHA-1: 59c25b505a93a80624a5a4c236d0a1ade9032f4a SHA-256: fa250c70168e01ca19fa15ebdd45047de79625e5b89ad4be0e7a18a3238cd9f3
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/get-robux-com-game-hack. These links are presented as 'Robux Generators' or 'game hacks', aiming to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

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/get-robux-com-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-2021-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-jailbreak-money-hack-download-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-jailbreak-hack-keycard-youtube_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-fix-roblox-studio-from-hacking_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-group-ad_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-thumbnail-in-roblox-studio_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pubg-uc-mtc_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbxcity-free-robux-instant-payout_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-para-roblox-prision-life-armas-admin_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/lion-studio-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-1-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/descargar-coin-master-hackeado_GM406889139.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_off000028fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28FB 21644 bytes
SHA-256: 652d836f9162b1db78e2e44555093036eea2efcc9c8c22bfb5a82f93eb0cd5f4
font_01_sfnt_off00005828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5828 18916 bytes
SHA-256: c2efe05e9d2138b719f685e0e190c44da44493e238d9fd68d8d9349a0cba08af

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