Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9b78895a96d970…

MALICIOUS

PDF

35.2 KB Created: 2021-05-24 03:50:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f4fa51aba9639c866792858dacd5265c SHA-1: 2caf88065d11ed035bfae55b81cd782890c13dc9 SHA-256: 3f9b78895a96d970da570db1d45fcb24423d41d872b4a2ced4eeddfb60be1889
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a document body that attempts to lure the user with promises of free game hacks and social media followers. The primary malicious link identified is https://netcdn.xyz/app/835599320/how-to-get-followers-on-tiktok-for-free-game-hack, which is associated with a high-severity heuristic for game hack redirects. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/835599320/how-to-get-followers-on-tiktok-for-free-game-hack PDF link annotation
    • http://www.lycee-langevin-wallon.com/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/free-robux-no-human-verification-or-survey-2021_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
stream_002_off00003056.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3056 25704 bytes
SHA-256: ac42150b34fb40b4799371d95d11452caa8e49e187fe2a8b1aae96fdc6d66ca3
font_01_sfnt_off00006a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2D 17692 bytes
SHA-256: b635499a4f9fb6d9e8967cb3fdd5afd49967982b90c247824071efdea06cfe8e

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