Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2023b0a3e05b70b…

MALICIOUS

PDF

44.9 KB Created: 2021-06-07 19:14:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e1b775d93abf9e22f49340314b16109 SHA-1: bb2eaa5586360eeecdf64bd9f872929717806bbb SHA-256: e2023b0a3e05b70b636c801633b6dcf6b9447180bb3a96e1e856a6d36e755c6f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that promise free in-game currency or hacks, such as 'how-to-get-free-robux'. The presence of these lures, combined with the ML classifier flagging the PDF as malicious, indicates a likely phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URIs strongly suggest a social engineering tactic to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-get-free-robux-no-hack-or-download-2021-game-hack PDF link annotation
    • http://meisterhaus-guterl.de/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-hack-generator-download_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/block-best-robux_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-coins-in-minecraft_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
stream_004_off0000511d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511D 24340 bytes
SHA-256: 33706f7e8043260cc7ee412dc71a55972464005e79b217ff45806b6a4586a17b
font_01_sfnt_off000088f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F0 19496 bytes
SHA-256: f8feec8c376335478e98b70e1a3ff155dd01476790e55f5b43c08e28bc856572

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