Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a9fb2b6eb3bafa…

MALICIOUS

PDF

44.7 KB Created: 2021-05-19 23:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 423cc574af61a606dbc26ab250f88c04 SHA-1: 27b153d9a1d1710146fe1aea24c993e8680bc95f SHA-256: f8a9fb2b6eb3bafa88eb34660cdd73b92fa7e26173850f19777abd0ffb177136
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 https://netcdn.xyz/app/431946152/roblox-avatar-tester-game-hack PDF link annotation
    • http://modlingua.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://modlingua.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/free-robux-group_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_003_off00004bc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC6 28152 bytes
SHA-256: 3d8004ad90501552d82d93ce3ee58cd52de959f6757b4545b3c894072f5a2f06
font_01_sfnt_off00008c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5D 18228 bytes
SHA-256: 202894cb6a5bec519cb1aff7aa26487a29ece32a0cf0ce5d4249a64a0c567dc3

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