Malicious PDF — malware analysis report

Static analysis result for SHA-256 899b154129af0888…

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 22:48:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: af6be79a860c2391d05ab9dc58588322 SHA-1: 727bb8b4f15e10326b18d3a2dce36ff5e92e9ee6 SHA-256: 899b154129af0888e377eb192f4f4ba2a5c7ab7284a5f0f750a3c18ac1b47fe0
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game hacks and generators, aiming to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/835599320/how-to-get-free-tiktok-game-hack, is identified as a known malicious redirector. The document's structure and embedded links suggest an attempt to exploit user interest in obtaining in-game advantages, likely leading to further malware delivery or phishing.

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/835599320/how-to-get-free-tiktok-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-vip-server-links_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-roblox-robux-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-legends-of-speed-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-gift-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-roblox-autokill_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-kind-of-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-apk-download-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-free-builders-club-account-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-someone-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-running-in-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-coin-master_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_off0000319f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319F 22280 bytes
SHA-256: 05fff369dfb2f897529507e77d4e3c8c6b357fcee8d2670c32f82f2748cec135
font_01_sfnt_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 18136 bytes
SHA-256: 61f376fbef98ac54559003721d44d6d91a164eee56c0d619480f99f42a44c18d

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