Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6535077b79ff763…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 06:52:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b0751496e106203a76f0120e485857f9 SHA-1: 7067e43a3710493a98616f011d969acd22032c17 SHA-256: b6535077b79ff76328e2557df42eede0cb41adf8d3bb21fbcd6c3739bf5377b7
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector, masquerading as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/cheats-for-roblox-mobile-game-hack, which is designed to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit vulnerabilities or trick users into executing downloaded payloads, aligning with common PDF-based malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.co/app/431946152/cheats-for-roblox-mobile-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-june-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-roblox-rum_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-bag-free_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/pubg-uc-qiymeti_GM1330123889.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spins-link-download-hack_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_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22072 bytes
SHA-256: 6d166d4e60778a35ea2a6a7e6d1bb10a8ac32b2af44d88d483e4642142f06f76
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 19236 bytes
SHA-256: a56ba210883c43bbc1d5d938447464ae11f2da203a19587c857097d339c4274a