Malicious PDF — malware analysis report

Static analysis result for SHA-256 766b1e8e77a2cf08…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 05:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 36bf3c42611fab5888fa94219038a434 SHA-1: 18ab4bcace1a9fb0ab4877116b9fb8545bf81dd9 SHA-256: 766b1e8e77a2cf08119b8982d2e0963073d91e0e06a057dd05aaab67e1d391e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-just-by-watching-videos-game-hack PDF link annotation
    • http://www.compusiteinc.com/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-hack-freehackshop_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-targets-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/get-free-robloxgg_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bandicam.comIn 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_off00004e21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E21 28132 bytes
SHA-256: f514648820ec3eadfadfbb60accb71d4717cf08cb7c50fdbe30952bf1ec5eb31
font_01_sfnt_off00008db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 19936 bytes
SHA-256: 786363ad66674c14352625acff76eae5eab6e39b715b7e8aa2683e3854ca14a8

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