Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8be56ec05c186e…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 17:44:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 151843a212eda2df5aea6b5bfc6e91c8 SHA-1: fbb91b10d2cfe77bcf9cf974b81583fc85860a6e SHA-256: ba8be56ec05c186efeda7813cf3ed9dd1cb547fde635392bf5ecdee096c0fa7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-online-spins-coin-master-game-hack. This lure is designed to trick users into believing they are accessing free game hacks or generators. The presence of a visual download button further supports the deceptive nature of the document. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt.

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/406889139/free-online-spins-coin-master-game-hack In PDF document text
    • https://www.atrax.hr/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/hacks-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/vehicle-simulator-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/denisdaily-free-robux-app_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/youtube-roblox-hack-by-ropanther_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-esp-hack-roblox_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/enderrobux-117-hack-para-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/caillou-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-dll-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-december-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-cheat-robux-in_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-codes_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_002_off00002e6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E6E 23016 bytes
SHA-256: e5cbb8ef6a1352344ee36be565bd1b87e16d14967baa318703c12c2a30fca6e9
font_01_sfnt_off0000624a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624A 18248 bytes
SHA-256: 69f566190966a66c1fe8ab6bbc8550b86d8e85ebd5e604a82219f2cafac13777

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