Malicious PDF — malware analysis report

Static analysis result for SHA-256 8499a17c39bb033e…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 14:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 258056adcd8a56337d71dd502dcedc57 SHA-1: 507fb8734e14d9b64526c8d6c98050b672c2650b SHA-256: 8499a17c39bb033e9291326e75039bd0ef265c781ee280c5f45c138240793c06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body and embedded URLs suggest a phishing or scam attempt, likely leading to further malware downloads or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/tower-of-hell-roblox-hack-game-hack In PDF document text
    • http://lib.kesdammedan.ac.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn 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_off00005185.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5185 27328 bytes
SHA-256: e2c5581e910f8fbeaee3f21ba15aa366ae76b335d678445603f5044169c05c76
font_01_sfnt_off00009068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9068 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off00009a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A07 18344 bytes
SHA-256: 03b0a99fcd61db89faa26c1828de523dc9cf9d0c2b9dbfe52dc8b55ccb7305a4

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