Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef0d222b562f692…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 07:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e8de1ee5c4b2aa03d2ea1a61f7e96d72 SHA-1: f8f60134676990a6381fcba989fd6cbf04f44789 SHA-256: bef0d222b562f692481603b672b60b061f75cc6e647553225ec4c5edff4ed7ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/free-robux-kid-friendly-game-hack. This lure is designed to trick users into visiting a potentially malicious site. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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-robux-kid-friendly-game-hack PDF link annotation
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-is-using-cheat-engine-hacking_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-often-pubg-uc-roots_GM1330123889.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-online-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-magical-chest-coin-master_GM406889139.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_off00002fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB1 21972 bytes
SHA-256: fa7b1f0f1234a2b6bd1deb12637c43dbb31f012a44bfa74c630d7c5adf83ae02
font_01_sfnt_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 19264 bytes
SHA-256: f1cb0ea9790fd9eec1381d6ece3e0061b345793659c4b6d6641704be3ef20a74

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