Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b60a90f81c6acb…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 09:45:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 453a7dddc7a95c27191b196ee743f77e SHA-1: 753c78998f447b6163012d9fc216bac1ff8a7784 SHA-256: 00b60a90f81c6acbf63e859f8174d2a09ce8bc0f8db55dc5d02ff2dec94a60ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/free-minecraft-games-for-kids-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/479516143/free-minecraft-games-for-kids-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-on-ios-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/r-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-mad-city-free-car-glitch_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/safe-free-robux-generstor_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-lua-executor-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-dr-benx-hacken_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hacker-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-frappe-hack-script_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-granny-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-on-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/glitches-for-free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-list_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-generate-pubg-uc_GM1330123889.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_off00003584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3584 22752 bytes
SHA-256: 25a14fc54fc36d60e0334de299389a5bdd19e2381f2c5a636e9b83dd2527f7d2
font_01_sfnt_off0000681e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 18432 bytes
SHA-256: fce0cee9bb026e9b658c5a6be084441bf5d333caf380f9a351f6fa516673a190

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