Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c63412c9afabc3…

MALICIOUS

PDF

44.1 KB Created: 2021-06-10 14:25:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ed2b6e2715de5fa45f6d96168e392506 SHA-1: 16ad58e78792383e967581a2a02b62f7b65e0055 SHA-256: 88c63412c9afabc3720f9952979a84828aa48394a1f1b498044445457b8eef23
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-retail-tycoon-money-cheat-game-hack.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.tw/app/431946152/roblox-retail-tycoon-money-cheat-game-hack PDF link annotation
    • http://perpustakaan.stietenggarong.ac.id/repository/counter-blox-roblox-offensive-free-skins_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-wall-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-without-verification-and-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/kachifpro_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005124.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5124 24116 bytes
SHA-256: 78675f9503066ea0d9cc0f9dca7ae1c3f5e48b614b42f6ecb7f605cacbd8e16c
font_01_sfnt_off00008864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 18780 bytes
SHA-256: e8f2ef44f3aa0d8076fe9a3988b2181cec5615ac68d95b2dc38d8731bedcf369

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