Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0cd3e849eb1278…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 10:27:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 74b640a747f64aed82e79c457577ea51 SHA-1: 994a29bc5cbad7f3ba03c5acd816572a65b42964 SHA-256: 7f0cd3e849eb1278c867cfe66aba91f75247da3f7587159d0dde2472d63d4081
160 Risk Score

Malware Insights

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

The PDF file contains a lure related to game hacks and redirects to a known malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts a malicious payload or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/roblox-com-hack-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/real-minecraft-for-free_GM479516143.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
stream_004_off000052e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E6 24680 bytes
SHA-256: 1bb53967c66a43cc4a92ded3fa086e21431fd7ba40c24e727f2f7153ddf8bef0
font_01_sfnt_off00008bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC4 18440 bytes
SHA-256: 998502f3d31251ba6a8b9f896cebf55eeafd88011b242c250778658ce2e0bbe6

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