Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76da2ee7de56fee…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 08:28:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a073493d09748ae68cb4109b6652a652 SHA-1: aac5a36f86f7c2cdc67fdd33532d43cc61ee00d3 SHA-256: e76da2ee7de56feec4b199094637d672d2be68952ae10b1268b7bdebf402939c
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 0.9969

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/406889139/coin-master-hack-100-working-game-hack PDF link annotation
    • http://w-i-r.de/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-game_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/hack-coin-master-nyc_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
stream_003_off00004b95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B95 24944 bytes
SHA-256: a26a5a971ce9c604ff1b877fedbd349056b9fef8f0614e8fdc60abcb6b4dc90e
font_01_sfnt_off0000856d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856D 18480 bytes
SHA-256: 08e8391c69bd521e699d78070ea8eb7eb0a5cf154e7740c19edaf501220ff0c1

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