Malicious PDF — malware analysis report

Static analysis result for SHA-256 038afd628bfc9573…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 22:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a42b414c674a6ec469970cd5c84220c1 SHA-1: cc190740be8ef3fb6d87e57f81d20281449a5d4c SHA-256: 038afd628bfc9573fcd25923ae5b6d7eeb8720d2bbe15b0485069331ba0b8f5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as "game hacks" and "free currency" lures. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a redirector to potentially download further malicious content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest 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.co/app/431946152/how-to-hack-games-using-check-cashed-not-roblox-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-how-to-change-your-skin-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-accounts-with-obc-lifetime-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-extension-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-any-tycoon-roblox-win10_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hacker-club_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-prison-miner-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-coins-and-spins-link_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_off00003166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 22268 bytes
SHA-256: 66b5de170c67caafd099ee61fdec1f2e3f9788982b62cf3118c405600a93f026
font_01_sfnt_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 19644 bytes
SHA-256: 20aca1eca3562c931f2945ce852cb85c6f7ee90279b2b545cdcb555010f55f2e

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