Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7a0d9b0f6e7b55…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 00:55:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8f4e05769b3e0573cc4257c782c25e23 SHA-1: c16cb384f6b9d122791331734a9843c90367f3df SHA-256: fa7a0d9b0f6e7b554d3a8053b9445ad30fc455b18ef590068475020f1c383257
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary redirector URL is https://netcdn.online/app/406889139/coin-master-apk-hack-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a social engineering lure designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-apk-hack-download-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tiktok-free-minecraft_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes_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
stream_004_off00004c10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C10 25504 bytes
SHA-256: c7677f7312bbda39c5f4936f09505965faf83ebd7d4fd0a8d0e43ba383e81bdd
font_01_sfnt_off0000862f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862F 18472 bytes
SHA-256: 0e3831818f38ae56d02806b9c0b62f33b1ecd4ca65c3265caa2049c7f667b959

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