Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb3a1e3efa6c2db…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 22:57:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0cfe4a2523bede4b060c8f59e9aeccaa SHA-1: 6b185958379f4c5be419aae380fe9189525ffa3e SHA-256: deb3a1e3efa6c2db3331d8112af12f221afade4ff4fd34955b74f85facb1312e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a common lure of 'free game hacks' to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/free-things-on-roblox-game-hack, is identified as a redirector, likely leading to a phishing page or malware download. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users through social engineering and potentially client-side vulnerabilities.

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/free-things-on-roblox-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/the-underground-war-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-free-robux-gratis_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/pubg-uc-980_GM1330123889.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-do-i-report-a-hacked-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-22-02-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/pokemon-go-free-stardust_GM1094591345.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-dungeons-download-free_GM479516143.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_off00002f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9A 22036 bytes
SHA-256: 9e731f60ead02adc6de3da3a3ac6ddee9db63cddee5d176633d7419e54462b8c
font_01_sfnt_off00006019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 18936 bytes
SHA-256: c4e611ffc66a9f2ae011f0cbe0d3da0ebe01f9ded7cacf33f871c84d0f478745

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