Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db192b1ee3825fa…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 02:13:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8310eafea3f4a96cc5d199220b48c648 SHA-1: f326114c14932ffa9830e63bf4f8bed704036c7f SHA-256: 9db192b1ee3825fa81204e19e4493ac6922c672fe9e92305c170055832f71a2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free spins'. The primary lure directs users to 'http://netcdn.tw/app/406889139/coin-master-free-spins-apk-game-hack', which is flagged as a malicious redirector. The document's content and embedded URLs strongly suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software.

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/coin-master-free-spins-apk-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-legit-with-proof_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/best-roblox-exploits-for-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-and-free-stuff-on-catilog_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-free-hack-2021-agust_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/new-roblox-infinite-jump-exploit-hack-working-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-use-cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-id-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-have-a-madcity-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-import-audio-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hacker-egg_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/cheats-for-roblox-android_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-coin-master-hack_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_off00003018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3018 22300 bytes
SHA-256: d0edd1a58f5c6f08207c2b16103e72032e73a2e4718bcfa95cfa102b98dc3046
font_01_sfnt_off00006154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6154 18344 bytes
SHA-256: 1dbe0fcba05c02502e584b0e7ffab6a4f048fc487afe950fa18a3df4b6395c6f

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