Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d89901c31bf374…

MALICIOUS

PDF

31.6 KB Created: 2021-06-27 17:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7328df645bc09edc9a4b055930bc20c7 SHA-1: cbdc23a56f818a16d104f35493e4f40ee0798870 SHA-256: 99d89901c31bf37438f49da682840bb95641127d8b1df7c61accf37e34fabca5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that lure users to websites promising game hacks and free items. The document body and extracted URLs strongly suggest a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and heuristic firings are sufficient to determine the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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.co/app/431946152/free-promocode-roblox-thanksgiving-game-hack In PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-people-hack-into-your-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-obby-games-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/hack-de-robux-real_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-a-fake-creditcard_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-hack-any-tycoon-game-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-hack-and-cheats-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/can-any-codes-give-u-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-catalog-free-animations_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-catalog-heaven-cheats_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-melissa_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/cheat-in-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-hack-202100-android_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/best-free-roblox-survival-games_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/happy-birthday-isabella-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-free-cards-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-robux-generator-reall-100-xd_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3175 21780 bytes
SHA-256: 7ddcf00abb942aa51fcbe0dbb20c1744425443afd3ca60331d9a9d53cae59268

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