Malicious PDF — malware analysis report

Static analysis result for SHA-256 847801ef393a698c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 21:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0c5a276af776f58f04067095db46b981 SHA-1: 2f657634af439608e4ee4c7ad211135642549b2a SHA-256: 847801ef393a698c802758b9a24ee72a62e74e27efd852b09fddbb7c5ffe53d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a 'game hack generator'. The presence of these links and the ML classifier's high confidence score indicate a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/rbx-earn-game-hack In PDF document text
    • https://www.mb-alati.hr/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://mb-alati.hr/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/dll-roblox-hack-february-2021_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-can-i-hack-in-kingdom-life-in-roblox_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/free-giftcard-codes-roblox_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_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 23208 bytes
SHA-256: d07be80dc07eace5ee5680739b8e465ac06aaf62871c068838604ef466407f1f
font_01_sfnt_off00006468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 18268 bytes
SHA-256: 9334bec3a56debae64cf6c4f31b2c22e48676996c03ea103fc9d0c4c7125ebda

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