Malicious PDF — malware analysis report

Static analysis result for SHA-256 57322a72d8aee739…

MALICIOUS

PDF

35.8 KB Created: 2021-06-30 06:15:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 27f335258b26e3a1f3e03bc994cfc025 SHA-1: 5dade60a3d950cf194ed648e103bd0bf18565a16 SHA-256: 57322a72d8aee739ecb78670652b5967a141060ccab54149d7a09e803eea6bf3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. These links redirect to malicious infrastructure, specifically http://netcdn.co/app/431946152/jailbreak-roblox-free-money-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a scam aimed at tricking users into visiting potentially harmful sites.

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.co/app/431946152/jailbreak-roblox-free-money-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/rocash-com-earn-free-robux-by-watching-videos-and-completing_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-tshirt-roblox-my-hero-academia_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-gucci-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-de-roblox-jailbreak-descargar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-to-get-admin-commands_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/quick-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hex-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-models-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-download-roblox-hacks-on-mac_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-look-awesome-in-roblox-for-free_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_off00003231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3231 22836 bytes
SHA-256: f112fdcf2e9f0fbdc78fcf6a4c566036220b17c8a208be026c4ee74ce0887318
font_01_sfnt_off000065ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BA 19480 bytes
SHA-256: d414a67866e1700721b41db7cd631813bd432dc7fc039e6f548e067b21776eef

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