Malicious PDF — malware analysis report

Static analysis result for SHA-256 5777350fb4cc5db9…

MALICIOUS

PDF

47.6 KB Created: 2021-06-04 04:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2963d0d870d500445f80e201bbbf0540 SHA-1: 891781e3cfa00e233f3320911490d51034392e33 SHA-256: 5777350fb4cc5db9dfb666612db816f8cbc9e092e9828676d8a9313f2d82423a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link that redirects to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body, though partially corrupted, contains similar lures and the target URL. This indicates a phishing attempt designed to trick users into visiting a malicious site, likely to download further malware or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/479516143/free-modded-minecraft-server-game-hack In PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://discord.ggIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005596.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5596 24708 bytes
SHA-256: 2c227115e95cb5ddf4420e54228b3ff86ab3b40e5f9490092ae5687499fff86e
font_01_sfnt_off00008e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0C 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off000097f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F5 18000 bytes
SHA-256: 088756902f929cbb0d1c0fa5d7f6f3d7dd891fd3cb3329064cb278e0751f8302

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