Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb79dfe923478d8…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 08:25:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d32633cd84c7f36f7ca5c572e82702c6 SHA-1: 4950cbf91fb62287d50c0327a60c824b48544c81 SHA-256: beb79dfe923478d86d051a35485f10d5bdb58845e1a27bc5d219c766d89a0a25
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a prominent link disguised as a game hack generator. This lure, combined with the 'Download Button' heuristic, strongly suggests a social engineering tactic to trick users into visiting a potentially malicious URL. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/coin-master-new-link-free-spin-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/dbor-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-script-injector_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-and-easy-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-that-actually-works_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-follower-hack-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/pubg-uc-qiymeti_GM1330123889.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-rogue-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-robux-for-free-2021_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
font_00_sfnt_off00002feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEB 22340 bytes
SHA-256: 5a3b7202c0708de5a76a5a5e0f88a89d0374792fe15bef39668948ff0e3689de
font_01_sfnt_off000061a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A8 18508 bytes
SHA-256: 79b9a27d0053041ad6906645aa4faf6565b34a6988944d829044528d7b2e3163

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