Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c71eb357253552…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 13:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e10fd67dda68bccbd45302a464470499 SHA-1: abc45a1c376a2ef1a50b4b271ff17abd0427e9c7 SHA-256: 17c71eb357253552740aadbb1969d7a6302fb6c05b17592966cfa7a95672da1a
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/how-to-hack-a-roblox-account-2021-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-any-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-exe_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-promocodes-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-clothes-on-roblox-easy_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/sword-fighting-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-et-free-robux-in-a-roblo-game_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-tool-cheat-hacker_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-free-without-downloads_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-glitch-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hacker-png_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/ac-market-coin-master-hack_GM406889139.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_off00002fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE7 21960 bytes
SHA-256: 6737ebd8654aeb277108895854456e5ebae184bfebe65cf3ae43824ff3c7f198
font_01_sfnt_off00006074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 19468 bytes
SHA-256: 8490c018c81cc22f14dab8ddf5d074d9e4c4287532f70e565512aa2c5e2164f3

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