Malicious PDF — malware analysis report

Static analysis result for SHA-256 181d4aa642ed2534…

MALICIOUS

PDF

33.2 KB Created: 2021-07-06 07:00:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 59e1df598166d601c2cf84d02f2fc243 SHA-1: 570e0b0833e281d99244aa7e4c2aff0b61a42767 SHA-256: 181d4aa642ed25346a5b9b4047f58b1ff1491e692a375c852fcbfaa37b60c71c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users to click on links. The primary link directs to a known malicious redirector, http://netcdn.tw/app/431946152/roblox-hacks-and-cheats-game-hack, which likely serves as a gateway to further malicious content or downloads. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-hacks-and-cheats-game-hack In PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-hack-your-friends-roblox-account_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/robux-gratis-funciona-hack-sin-cortes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-minecraft-account_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
font_00_sfnt_off00002bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF1 22088 bytes
SHA-256: 96c39e182ac1a90417c0d6091438b301c47473292595997dbff677ee8d04d1b9
font_01_sfnt_off00005ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE9 19100 bytes
SHA-256: 964942e37439f8f9ab640eaa6d4c9b22aea120d806056d36c6a4670d34d844b2

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