Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d03e4d0365130d1…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 18:49:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9dc32fdd33f9e66cc6c944bd637c144f SHA-1: e820966973241f82840451fae4ee987bb7601e62 SHA-256: 4d03e4d0365130d1ff5673bc8a89a37172f18a75be7ec620a55f3f536a9a2939
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-spin-link-for-coin-master-game-hack. The document body and embedded links suggest a lure for game-related cheats or currency, which is a common social engineering tactic. The presence of multiple redirector links indicates a high likelihood of malicious intent to lead the user to a compromised or malicious site.

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
    • http://lib.stimykpn.ac.id/repository/how-to-change-your-speed-no-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-dbr-roblox-ccv3-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-promo-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-promo-codes-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-june-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-clothe-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-builders-club-roblox-trial_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mega-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/flame-gg-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-speedhack-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-this-game-has-shut-down-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-a-samsung-phone_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/good-hacker-names-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-murder-mystery-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-mustache-free_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_off00003148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3148 22920 bytes
SHA-256: 648a532e6262765a07dd3bfdbf44255c1ded83c93d7d9ef92791661d087148e8
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 18344 bytes
SHA-256: 73296c36ae02266707d13b3c106b47ee8249e938a6a7036fcc30fdbaeed21dbb

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