Malicious PDF — malware analysis report

Static analysis result for SHA-256 0304ff0b21ce0c34…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 01:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2474590a26edd0fa8184a169fc0c8144 SHA-1: 3f6ba873dca8e5baacd8b2966911cc1403fb3f1b SHA-256: 0304ff0b21ce0c340b269682f38435fdb0a2c59cfd0d15a4e869c4622b352aae
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to a known malicious redirector, disguised as a lure for free in-game currency and hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially malicious websites. No scripts were extracted, but the presence of malicious links and the ML classifier output indicate a high likelihood of malicious intent.

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/431946152/free-robux-on-phone-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-accounts-roblox-download-for-chromebook_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-api_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-card-codes-list_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/cheat-roblox-lifting-simulator_GM431946152.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/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-look-like-a-pro-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-fly-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-you-make-a-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robloxe_GM431946152.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_off0000329c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329C 21992 bytes
SHA-256: aa354859e1bd6f7989f842081bd732d78a84ec63df4df947e4056a95a45d4b8e
font_01_sfnt_off000062ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 19036 bytes
SHA-256: 3bc7039bf1a02ee44cf77d87306d68fb788e2fdb5082ebb4bdc7c743d7253944

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