Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ca76ff1550b765…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 21:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14e9ca32c19db50402ab5716c7f52647 SHA-1: 87f53b3646791f54838313418eaee58d8480424b SHA-256: 09ca76ff1550b7658ad4bef83a29785cfe50a0b9ca06fdd01173b37d0910b3e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to potentially malicious infrastructure, masquerading as game hacks or generators. The heuristic firings strongly indicate a malicious redirector designed to lure users into clicking these links, likely for further malware delivery or phishing. No scripts were extracted, but the presence of numerous malicious links suggests a phishing or malware distribution attempt.

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/free-models-roblox-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-jailbreak-roblox-2021-krankheit_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-headphones-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-and-no-application-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/como-tener-robux-sin-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-bandit-simulator-hacker-crate_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-premium_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-free-robux-without-any-identification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheats-invincibility_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-jailbreak-infinite-money-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/discord-king-of-queen-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-level-4_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_off000031c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C1 22944 bytes
SHA-256: afabd1aa615f1410c912286a7ab983d1d134640b2d00730037b672749501f6f6
font_01_sfnt_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 19020 bytes
SHA-256: 93f0297a325f2c0f0dca55885dd7ce322bab35135ec39a225f2bb07c8a7e5f96

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