Malicious PDF — malware analysis report

Static analysis result for SHA-256 e284aa22f074c6f7…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 08:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 57af84707b9d10efb59ca8124efe0620 SHA-1: a32f04ddb818ff4b1f015f81a8016efc9e83e5e6 SHA-256: e284aa22f074c6f7cff0c617764eed58d37fcf1991c0e9c488a1213f74818d30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/free-spin-link-for-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites. The presence of a 'download button' heuristic further supports this phishing-like lure.

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-spin-link-for-coin-master-game-hack In PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/hack-para-tener-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-game-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-comment-avoir-des-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/pastebin-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox4allcool-hack-team_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/free-robux-codes-december-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/code-triche-roblox-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-hack-tool-with-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-to-get-free-items-by-inserting-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-and-tix-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mismiftahulumam.sch.id/__statics/gudangsoal/files/roblox-games-with-free-vip-servers_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_off00003680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3680 23096 bytes
SHA-256: ce9a22036f9154270126645060c864cd0fabb0c668d33fbb33dc8fe083ec6247
font_01_sfnt_off00006a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 18344 bytes
SHA-256: 73296c36ae02266707d13b3c106b47ee8249e938a6a7036fcc30fdbaeed21dbb

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