Malicious PDF — malware analysis report

Static analysis result for SHA-256 307cb0e7d873fb83…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 05:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3a30331e6d2438d22aab14a88c860b70 SHA-1: f8dba99fb8285ce02a030c94663063facb3638f0 SHA-256: 307cb0e7d873fb83d74b35f5b51c9acc5c464811756ea8eedc1eebe4c21860b7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on embedded links. The primary link, https://netcdn.online/app/431946152/how-to-hack-a-roblox-account-2021-game-hack, and numerous others hosted on aeridefense.com, likely lead to malicious websites or malware downloads. The ML classifier strongly indicated maliciousness, supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/how-to-hack-a-roblox-account-2021-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-free-draw_GM431946152.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_off00005187.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5187 26224 bytes
SHA-256: 14cf28b218a43ec17e1e41d2cbf0d126f4c2f4844d2b0c17584c2605972579f0
font_01_sfnt_off00008e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E16 18992 bytes
SHA-256: aeef6a7714c6357f73dd4bac3524810632f54ab1d1528492d13c90d39421ba58

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