Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd53be1cf0057692…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 05:37:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 22f12621453bbbcffdd92c104b487a93 SHA-1: 0992261f187964d51fa7d1f327a197aca9e535e1 SHA-256: cd53be1cf005769218e37b15665d188daa62654d3b87f814eb43e7a0a77ef967
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 infrastructure, specifically advertising free game hacks and currency for popular games like Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates an attempt to lead the user to a malicious site. No scripts were extracted, but the document's structure and embedded URLs suggest a lure for users to click through to a potentially exploitative or malware-distributing website.

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/apocalypes-rising-roblox-hacks-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/lointh-gamng-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-livr-emerald-giveaways-roblox-direct_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/fart-attack-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/4-op-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-the-ninja-animation-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-rixty-codes_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-pins-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-how-to-get-a-free-dominus-hat-2021-australia_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-coin-master-spins-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_off00003014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3014 21700 bytes
SHA-256: 02a2033f846d7a237503c429bee2a78d4cc2a84d36373d79ca9009604009dae5
font_01_sfnt_off00005fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 19132 bytes
SHA-256: c8ceae6720ad61ec015348cad18af9dce23a8cc791f1120427e116e4446c991a