Malicious PDF — malware analysis report

Static analysis result for SHA-256 58143f49dfe0a88a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 22:41:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fdd2f7e701b87dc6521978b1ea37e14e SHA-1: 31d3bb0bf9d3b48f8a6e8576c6ab66e06e4cc4f5 SHA-256: 58143f49dfe0a88a7cf5eaddf328e31dded26817aa9fc834de3729d1ffb3c046
102 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent lure related to game hacks, specifically for Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. The document body reinforces this by directly linking to a URL promising a 'Coin Master Spin Hack'. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-coin-master-spin-hack-game-hack PDF link annotation
    • http://library.stiks-tarakanita.ac.id/repository/free-gtv-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/galaxy-beta-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-hack-roblox-account-top-9ways_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-hack-20210-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robux-card-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-on-the-game_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/hack-with-no-virus-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-beyond-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/dragon-ball-super-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-robux-on-iphone-no-human-verification_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_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 22384 bytes
SHA-256: 2faff21444efe62e3649e8094fa6749e6fc1767e80269461c13bf18cad2098ce
font_01_sfnt_off0000621d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 18344 bytes
SHA-256: 1b45721854a26912eac4a4073874816a3bc474c99f5ea999af20f5b07fe9c6b8

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