Malicious PDF — malware analysis report

Static analysis result for SHA-256 57834854288c91a2…

MALICIOUS

PDF

48.6 KB Created: 2021-06-07 16:58:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 04c497060c366a202cf8c28a5bfc0ad3 SHA-1: 12080d548e1730ad87e812a65cafa3fb03d50b3d SHA-256: 57834854288c91a284185d40b30a52f7cff7defe177187555a27f86ec1ba8365
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to malicious redirectors, masquerading as 'free generator' or 'game hack' lures. It also presents a visual download button and prompts the user to install a browser extension or update, indicating a social engineering tactic to trick users into clicking malicious links. The primary malicious URL identified is https://netcdn.tw/app/431946152/how-2-get-free-robux-on-roblox-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.tw/app/431946152/how-2-get-free-robux-on-roblox-game-hack In PDF document text
    • http://solidkom.ch/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-tiktok-followers-generator-no-human-verification_GM835599320.pdfIn PDF document text
    • http://solidkom.ch/images/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FA 30040 bytes
SHA-256: 04b8330a154cf2da56456be61359dbffd47dd9ff4a105c46b2eb6385137334c7
font_01_sfnt_off00009b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1B 18480 bytes
SHA-256: 12fe79082e64793153cab0bd6d657aa557f2fc0f6185b8b93002b06514a58ef9

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