Malicious PDF — malware analysis report

Static analysis result for SHA-256 551b2c26e0030439…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 00:55:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a19c1a8ffb517ac5e50d7fe37ca41f7a SHA-1: 7a8e5f68e4f7da75e359320dd200e376842e6dbd SHA-256: 551b2c26e00304390d09844a90cf17d7a6301d3dac5cb337dab5bcf441c7776b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure URL is http://netcdn.tw/app/431946152/how-do-u-hack-roblox-game-hack. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or social engineering attempt 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/431946152/how-do-u-hack-roblox-game-hack In PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/roblox-hacker-2021-exe-download_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/como-hackear-roblox-2021_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-skeleton-package-free-roblox_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/bandit-roblox-exploiter-for-free_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/hack-roblox-weight-lifting_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-15-free-spin-link-of-last-5-days_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_off00002ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFD 22028 bytes
SHA-256: 603a026d573182517c0fa256ea4a5690be06c0852fcf142187a9cf8f9cac6157
font_01_sfnt_off0000606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606A 18988 bytes
SHA-256: c91385222d36a947d3be30eb27485a4efa68f443f62ed41846c800c63ed9c478

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