Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ab920c39381243…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 18:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8a69af26805ceb4c9b8cbb245be7bb1f SHA-1: 9cfed12b0f1684666227052cc23ec8ce878dad70 SHA-256: 77ab920c393812436515e48b87d8de9119c8e180133342a2c14a7aa36a78f304
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to game hacks and free currency for popular games like Roblox. The primary link, http://netcdn.tw/app/431946152/watch-ads-for-robux-game-hack, is flagged as a high-severity lure for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to redirect users to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/watch-ads-for-robux-game-hack PDF link annotation
    • http://sdn4-wates.sch.id/akasia/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-exploit-your-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-youtube-video_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-piano-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-2-roblox-credit_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/cheat-engine-64-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/easy-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/download-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-create-a-free-admin-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-free-flying-practice-place_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-easily-promoted-on-roblox-groups-hack_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-hack-proof_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-kostiumy-w-roblox_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_off00002da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA5 22744 bytes
SHA-256: 18b5428182084a21cae221b625e93a2df436bf962fa3f0d7751d6fb603523f04
font_01_sfnt_off000060b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B0 19360 bytes
SHA-256: 3afd0598bb5a5ad237ecb392e60babe63cf66cf5547cf504e55ce532e2e57b01

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