Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c908e4fa38c34b…

MALICIOUS

PDF

34.1 KB Created: 2021-06-17 18:08:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 638b589c4d940b2bf679fd25151374f8 SHA-1: 2a285f8760643ec836b2ff79c1fceeea833f5dc1 SHA-256: f9c908e4fa38c34b7f82fa6859fff41c8e7bda4854ce1229b10d01353feb9bea
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.co/app/431946152/roblox-high-school-life-hack-game-hack PDF link annotation
    • http://rushxpress.de/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/roblox-ninja-simulator-2-cheat-engine_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/pokemon-go-no-free-box_GM1094591345.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/roblox-2021_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/wurst-115_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/robuxian-com-free-robux-code_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-spins_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_off00002f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F94 22368 bytes
SHA-256: f0b318df8ffb943581fb901305a32bcaf868a37a87095853073f6506f11fc363
font_01_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 18756 bytes
SHA-256: 75c6763f98b6b27262cad0537d39df65b71fb4a8597d1d964979376932bf93c7

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