Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90a3ba4a4ab5d49…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 08:27:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e49181d9be83f880bea9cc9a704f02d SHA-1: d11b6da6bd33a5f54ff687e2f2844d90acd2152a SHA-256: c90a3ba4a4ab5d49e7fdf011c4b21a0956115c54e92bc2138ec5d207dbac9f7f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9832

Heuristics 4

  • 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.
  • 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.online/app/431946152/how-to-get-free-robux-without-surveys-game-hack PDF link annotation
    • http://abdinusababellibrary.ac.id//repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/pubg-hack-uc-20219_GM1330123889.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.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_004_off00005244.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5244 27792 bytes
SHA-256: 52cff9dff721cb42d8beb63f6a77c587ac9618fda056f9767a7dc6fce43cbd02
font_01_sfnt_off000090ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EC 19060 bytes
SHA-256: 402aebe8c34fdbdb56c6d5ac0c879f316ccc47677bd032b34ef61ae0ac5a4f59

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