Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cd10db0d8de633…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 13:07:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 24907f593901942b44881706fde6c840 SHA-1: 038baf0f5700065639a882045e840283344426e0 SHA-256: 82cd10db0d8de633af560ac10b2840c54e98791b3387946382e9000d9cea2a48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector infrastructure. The document body and embedded URLs reinforce this, indicating a phishing attempt to trick users into visiting a malicious site. No scripts were extracted from this sample, but the overall pattern suggests a phishing lure designed to lead users to a potentially harmful download or exploit.

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/835599320/tiktok-for-free-install-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-gae-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-promo-codes-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/delta-roblox-hacking-tool_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-btools-hack-2021-october_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-adiidas_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-coin-master-free-spins-in-email_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_off0000304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 22136 bytes
SHA-256: 59f7b35462dc29d86310ea10dd0bc222313c3344a85bb45dae1ca41c2039f5d9
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 18048 bytes
SHA-256: 927f35172e0059b4cf7eeec3d46a60e736cc13e57e8a3791ee96a1dbbb4c4f67

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