Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b74979bbbc87f89…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 01:08:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 57839e4f7fe2aa2df54fe110503a4801 SHA-1: 6bb18e797749bf2660b0e6120031fe8591841469 SHA-256: 1b74979bbbc87f89e673003d4b81fecb85594ec1fc204b7158687eba6d1b2bdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, masquerading as game hacks and generators. The primary redirector URL, http://netcdn.co/app/431946152/inject-hack-roblox-2021-game-hack, is flagged as malicious. The document body and heuristics indicate a lure for users interested in free in-game items, a common tactic for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/inject-hack-roblox-2021-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-run-fast-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-roblox-to-get-robux_GM431946152.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
font_00_sfnt_off0000322b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322B 22036 bytes
SHA-256: 2c2b88be204d1934c2610fae2d021b530dc9cce4c66d81d3352b3a5b52fcfe9e
font_01_sfnt_off0000630b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 19348 bytes
SHA-256: d2e63f32ef70f63552028045e22cab40f9d3b153f25f48e5edf8d29b3129129e

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