Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bb49c3a5e12759…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 20:29:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11f40d801a12e7d5aedcac34c7868b8b SHA-1: 92d9e4826aada4cff3d1ae1c971bd4a427dcb3f3 SHA-256: 67bb49c3a5e12759eac8f61fb6cc47436bea8d1dc6da19271566ef23f90e2fb2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9980

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/431946152/free-robux-np-verification-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-codes-for-toys-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/http-gamesjarcom-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-rare-hats-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/spare-reborn-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-para-murder-mistery-2-2021-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-roblox-avatar-items_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_off00002e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5B 22152 bytes
SHA-256: da9f25ba57795019f45c08fbd06c5dd9391523411b6cc5a125c4e13d94abf00b
font_01_sfnt_off00005f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 19064 bytes
SHA-256: 0b9d15f4100831e383090bd16e750083b7740d3f7a54b6d747a043352e9ff3e1

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