Malicious PDF — malware analysis report

Static analysis result for SHA-256 979b6e891c79bd3b…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 05:15:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 847a242213f9905cd77da8e7266b883d SHA-1: 4f945f28bbd33862698e4de98eabd0fb79ea70c5 SHA-256: 979b6e891c79bd3b98bff3f19a1b4355176c4bcb3883134d4e2cac8a320294be
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users with promises of game hacks and free currency. These links redirect to a malicious domain, likely to host further malicious content or phishing pages. The ML classifier also flagged this PDF as malicious, increasing confidence in the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/moonactive-free-spins-coin-master-game-hack PDF link annotation
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D1 25512 bytes
SHA-256: fe9ce24ae7e79f52d9fe9a946645721c12afaf80e7cdaa505270a91c5351e623
font_01_sfnt_off00008b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9B 2868 bytes
SHA-256: 00109425b76763440a5569341faade0445b3c9f8514523a6f287fddbc9082efe
font_02_sfnt_off00009588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 18000 bytes
SHA-256: 525e065cc595701650099d1f547d5a2db26dd24a903bd4cc3081529fc79bef99

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